Здравствуйте, Уважаемые Студенты! Продолжаем наши занятия, напоминаю Вам о том, что на этой неделе необходимо сдать 5 тем. Темы сдаются устно!
ВНИМАНИЕ: НАПРАВЬТЕ Квитанции об оплате в центр образования по почте либо подтвердите лично!
С этой недели также вводится диктант с которого начинается любое занятие, слова и фразы для диктанта будут выданы мною на занятии, это обязательная лексика, которой Вы должны владеть, также, как и элементами Таблицы Менделеева!
1) Grammar (TEST) - предоставляется на занятии.
2) Reading/Translating - https://www.ck12.org/book/CK-12-Chemistry-Intermediate/section/10.0/ - чтение/тесты/перевод.
* Для тех, кто присутствует на занятии, в блог публикуются только результат теста, при условии, что он выполнен в течение занятия.
**Для тех, кто по состоянию здоровья работает удалённо, необходимо публиковать в блог все тесты полностью в день проведения занятия.
3) Listening -http://www.bbc.co.uk/learningenglish/english/features/6-minute-english/ep-190829
- ответить на вопросы в блог перед тем, как прослушаете программу, далее сравнить свои ответы на вопросы с предложенными в тексте. На основе текста составить своё мнение на тему.
ВНИМАНИЕ: НАПРАВЬТЕ Квитанции об оплате в центр образования по почте либо подтвердите лично!
С этой недели также вводится диктант с которого начинается любое занятие, слова и фразы для диктанта будут выданы мною на занятии, это обязательная лексика, которой Вы должны владеть, также, как и элементами Таблицы Менделеева!
1) Grammar (TEST) - предоставляется на занятии.
2) Reading/Translating - https://www.ck12.org/book/CK-12-Chemistry-Intermediate/section/10.0/ - чтение/тесты/перевод.
* Для тех, кто присутствует на занятии, в блог публикуются только результат теста, при условии, что он выполнен в течение занятия.
**Для тех, кто по состоянию здоровья работает удалённо, необходимо публиковать в блог все тесты полностью в день проведения занятия.
3) Listening -http://www.bbc.co.uk/learningenglish/english/features/6-minute-english/ep-190829
- ответить на вопросы в блог перед тем, как прослушаете программу, далее сравнить свои ответы на вопросы с предложенными в тексте. На основе текста составить своё мнение на тему.
Reading unit 8- 88%
ОтветитьУдалитьReading unit 9- 81%
Reading test 8 -85%
ОтветитьУдалитьReading test 9 - 88 %
Grammar test 84%
ОтветитьУдалитьReading unit 8:90%
Unit 9:98%
Reading:
ОтветитьУдалитьUnit 8- 96%
Unit 9- 93%
Grammar : 85%
Grammar test 85%
ОтветитьУдалитьGrammar 82%
ОтветитьУдалитьGrammar test - 85%
ОтветитьУдалитьUnit 8- 80%
Unit 9 - 90%
УдалитьAt the moment, our planet suffers from numerous problems and damages. For example, acid rain, which is the result of waste gases from power stations. Such rains cause forest damages. Other big problems are water shortage and the destroying ozone layer. It is all the result of pollution that comes from factories and plants.
УдалитьAs you can see, there is a long list of environmental problems, which need to be solved. Otherwise, our planet Earth may get fully destroyed. People should start dealing with these problems immediately. The most important thing they can do is to change their attitude towards the environment. First of all, people should switch to alternative forms of power, such as wind power or solar energy. Secondly, the use of nuclear power should be banned. Thirdly, we should start to recycle. It’s the art of turning waste into new products. Other than that, the number of harmful plants should be reduced because they pollute the air and water greatly. It would be a good idea if people started using bicycles instead of cars.
1. I can help the environment by using less plastic stuff. As a student of polymer processing department I can help find ways of rational use of the polymer materials.
Удалить2. I can use reusable dishes for my dinner and bottles for water. Secondly, I should to throw out garbage to letter bins or to the points of waste sorting.
3. We all can also peak up after themselves.
In my opinion it is really hard to save our planet and to make a change while all the governments are obsessed with the idea of developing the economy which automatically means more production of things that ordinary people are supposed to buy.So I think that now the only possibility to really make a change is to stop consuming and focus on long-lasting quality.This is why everyone can make an impact by choosing their purchases wisely.Small steps always matter.
ОтветитьУдалитьNowadays everyone is talking about the environmental problems,especially about plastic pollution because of some recent scientific researches.But although this topic should concern everybody,only the minority of people is ready to somehow change their habits in order to help the environment.
УдалитьPlastic is used in every sphere of life.But a big percentage of plastic items are thrown away after a one-time use because people don't think about the consequences of their behaviour.It's important to understand that many things can be replaced by a more sustainable alternative.The best example is the reusable coffee cup which you can bring with you to your favourite coffee shop and then you won't need the one-off cup.If you start making small steps towards a non-plastic life,you will soon be very happy about your personal impact.
In my opinion,plastic is not a hundred-percent bad thing.It has its good qualities that make this material better then others.And in some branches like medicine,for example, you can't avoid one-time plastic because of hygiene.But except for this cases,I think that we should bend every effort in order to avoid plastic and live a more sustainable life.
My idea: I can help the environment in many different ways. Waste sorting was the first thing that came on my mind. I think that everyone can sort their garbage without a lot of efforts. People can also peak up after themselves. This simple rule can help to cut down the number of animal deaths.
ОтветитьУдалитьI can help the environment by using less plastic stuff. As a student of polymer processing department I can help find ways of rational use of the polymer materials.
ОтветитьУдалитьI can use less fresh water and electricity, use re-usable stuff and think about the ecosystem.
People have to stop wasting things irrationally and change their attitude to environment. Our planet is in danger and this danger is caused by us.
In the modern world we face the problem of saving the environment. Nowadays people use tons of plastic, waste fresh water and don't think about the future. All this things can terribly harm our planet and us personally. But how can we help the environment?
First of all, people have to use less plastic. It's quite easy. Use re-usable bags and teacups, save water and electricity, buy in bulk, that is usually cheaper and can be better environmentally. Re-using is a really good way to safe the environment. You don't have to throw clothes, toys and other stuff, if they are in good nick. You can always sell it or pass on to your friends and relatives.
Saving the environment is not easy. But if all the people would think properly about their wastes and needs, it would make our world better.
1. I can help the environment in many ways. I should always remember that environment is a fragile structure. I have to take care about it.
ОтветитьУдалить2. Firstly, I can use reusable dishes for my dinner and bottles for water. Secondly, I should to throw out garbage to letter bins or to the points of waste sorting.
3. I think that taking care about environment must become global process
Essay
How can I help the environment? Nowadays it is very important question for humans.
An invention of plastics and polymers materials is marvelous, because it gives us a lot of benefits and opportunities: toys, clothes, tooth brushes- mostly all thing around us are made of plastic. Bur when we throw out our plastic garbage, we don’t even realize how long it takes to decompose it. So we face with huge environmental problems: for example pollution and plenty of litter in the streets.
Fortunately, we can help the environment. Firstly, We should buy products in bulk (for example shampoo). It is not only environmental-friendly action, but very convenient too.
Secondly, there are lots of secondhand-stores, where we can buy clothes, that people wanted to pass on. Likewise, we can pass on things to our relatives and friends just for free.
And the last point I want to mention is reusable cups and bottles for water. If every of us have his own bottle, there will be less plastic garbage!
All in all, I strongly believe that everyone can help environment. It’s not hard, most of environmental- friendly habits are very simple for everyday life- routine. And we should always remember that our nature is fragile and we have ta take care about it.
Test 10.1
ОтветитьУдалить1.The number 6.02 × 1023 is called Avogadro’s number, the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of pure elements, the representative particle is the atom.
2.a.unit
b.unit
c .molecule
d.molecule
3.4,2,9
4.a.A mole of any substance contains the same number of representative particles.
b.One mole of water contains Avogadro’s number of molecules.
5.69,72 g/mol
6.a.2,35*10^22
b.2,24*20^25
c.4,82*10^25
d.8,13*10^20
7.a.0,52 mol
b.0,013 mol
8.1,5*10^24 atoms
9.a.137 g/mol
b.197 g/mol
c.400 g/mol
d.325 g/mol
10.5
In my point of view it is important to be environmentally friendly. Each of us can make a difference.
ОтветитьУдалитьThere are two great examples of how we can help the planet in this text. First of all, we can buy food and other provision in big containers and decant it into smaller reusable containers. Small packs are not good for environment, because a lot of packaging is used for a small amount of product. Secondly, lots of things that we don't need we can pass on to other people.
People don't realise how important to help the environment. I think that's because we don't bring up this topic enough. Even if you think that you can't make a difference by yourself there are lots of people who saves the planet right now. Each our step matters.
Test 10.1
ОтветитьУдалить1) The number 6.02 × 10^23 is called Avogadro’s number, the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of pure elements, the representative particle is the atom. Samples of pure iron, carbon, and helium consist of individual iron atoms, carbon atoms, and helium atoms, respectively. Seven elements exist in nature as diatomic molecules (H2, N2, O2, F2, Cl2, Br2, and I2), so the representative particle for these elements is the molecule. Likewise, all molecular compounds, such as H2O and CO2, exist as molecules, so the molecule is their representative particle as well. For ionic compounds such as NaCl and Ca(NO3)2, the representative particle is the formula unit. A mole of any substance contains Avogadro’s number (6.02 × 10^23) of representative particles.
2) a. formula unit
b. atom
c. molecule
d. molecule
3) a. 4 b. 2 c. 9
4) a. A mole (mol) is the amount of a substance that contains 6.02 × 10^23 representative particles of that substance. The mole is the SI unit for amount of a substance.
b. There are therefore 6.02 × 10^23 water molecules in a mole of water molecules.
5) 69,72 g/mol
6) a. 2,35*10^22
b. 2,24*10^25
c. 4,82*10^25
d. 8,13*10^20
7) a. 0,52 mol
b. 0,013 mol
8) 1,5*10^24 atoms
9) a. 137 g/mol
b. 197 g/mol
c. 400 g/mol
d. 325 g/mol
10) 5
Test 10.2
Удалить1) A similar conversion factor based on molar mass can be used to convert the mass of a known substance to moles. In a laboratory situation, you might perform a reaction and produce a certain amount of a product. It will often be necessary to then determine the number of moles of the product that was formed, but this cannot be measured directly. However, you can use a balance to measure the mass of the product, and the number of moles can be easily calculated. The next Sample Problem illustrates this situation.
2) Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible. A given volume of a gas with small light particles, such as hydrogen (H2), contains the same number of particles as the same volume of a heavy gas with larger particles, such as sulfur hexafluoride (SF6).
3) Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure.
4) a. increase
b. decrease
5) a. 0.50 mol of CH4
b. 1.0 mol of HCL
c. 1.0 mol of HCL
d. the same
6) a. 0.76 mol
b. 0.71 mol
c. 1.56 mol
d. 12.88 mol
e. 22.9 mol
f. 0.058 mol
7) a. 76.8 g
b. 0.98 g
c. 2623 g
d. 324 g
e. 15.6 g
f. 0.69 g
g. 11.03 g
8) a. 62.27 L
b. 7.06 L
c. 339.2 L
d. 3.7 L
e. 15.3 L
f. 3.45 L
9) a. 56.68*10^23 atoms
b. 5.04*10^23 molecules
c. 0.048*10^23 formula units
d. 0.0067*10^23 atoms
10) a. 3.125 g/L
b. 0.18 g/L
11) M=46 g/mol
NO2
12) 2.09*10^23 atoms of C
13.68*10^23 atoms of H
1.71*10^23 atoms of O
13) 2.03*10^23 atoms of Al
Test 10.3
Удалить1) aluminum - 2
sulfur - 3
oxygen - 12
2) A hydrate can usually be converted to its anhydrous form by heating.
3) a. C4H9
b. HO
c. NO2
d. C5H12
4) In many cases, the molecular formula is the same as the empirical formula. For example, the molecular formula of methane is CH4, and, because 1:4 is the smallest whole-number ratio that can be written for this compound, that is also its empirical formula. Sometimes, however, the molecular formula is a simple whole-number multiple of the empirical formula. Acetic acid is an organic acid that gives vinegar its distinctive taste and smell. Its molecular formula is C2H4O2. Glucose is a simple sugar that cells use as their primary source of energy. Its molecular formula is C6H12O6. They are very different compounds, yet both have the same empirical formula, CH2O.
5) SiO2
6) а. К - 33% Br - 67%
b. N - 26% H - 7% Cl - 67%
c. C - 62% H - 10% O - 28%
d. Ba - 68% P - 10% O - 22%
7) a. 1,4 g
b. 84,42 g
c. 25,42 g
d. 3,96 g
8)d. Li3N
9) а. 44%
b. 29%
10) a. ClF3
b. SrCO3
11) a. C4H8O4
b. C6H3Cl3
12) N2O4
13) a. 4,51 g
b. 0,25 mol
c. 0,05 mol
d. CuSO4*5H2O
Test 10.1
ОтветитьУдалить1) The number 6.02 × 10^23 is called Avogadro’s number, the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of pure elements, the representative particle is the atom. Samples of pure iron, carbon, and helium consist of individual iron atoms, carbon atoms, and helium atoms, respectively. Seven elements exist in nature as diatomic molecules (H2, N2, O2, F2, Cl2, Br2, and I2), so the representative particle for these elements is the molecule.
2) a) formula unit b)unit c )molecule
d)molecule
3.4,2,9
4. а)A mole is the amount of a substance that contains 6.02 × 1023 representative particles of that substance. The mole is the SI unit for amount of a substance. Just like the dozen and the gross, it is a name that stands for a number.
b)There are therefore 6.02 × 10^23 water molecules in a mole of water molecules.
5.69,72 g/mol
6.a)2,35*10^22
b)2,24*20^25
c) 4,82*10^25
d) 8,13*10^20
7.a) 0,52 mol
b) 0,013 mol
8.1,5*10^24 atoms
9.a) 137 g/mol
b) 197 g/mol
c) 400 g/mol
d) 325 g/mol
10.5
Test 10.2
ОтветитьУдалитьIt will often be necessary to then determine the number of moles of the product that was formed, but this cannot be measured directly. However, you can use a balance to measure the mass of the product, and the number of moles can be easily calculated.
2. Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible. A given volume of a gas with small light particles, such as hydrogen (H2), contains the same number of particles as the same volume of a heavy gas with larger particles, such as sulfur hexafluoride (SF6).
3.Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure.
4.
a ) increase
b) decrease
5. a)0.50 mol of CH4
b) 1.0 mol of HCL
c) 1.0 mol of HCL
d) the same
6. a) 0.76 mol
b) 0.71 mol
c) 1.56 mol
d) 12.88 mol
e) 22.9 mol
f) 0.058 mol
7. a) 76.8 g
b) 0.98 g
c) 2623 g
d) 324 g
e) 15.6 g
f) 0.69 g
g) 11.03 g
8. a) 62.27 L
b) 7.06 L
c) 339.2 L
d) 3.7 L
e) 15.3 L
f) 3.45 L
9. a.)56.68*10^23 atoms
b) 5.04*10^23 molecules
c.) 0.048*10^23 formula units
d) 0.0067*10^23 atoms
10. a)3.125 g/L
b) 0.18 g/L
11. M=46 g/mol NO2
12.
2.09*10^23 atoms of C
13.68*10^23 atoms of H
1.71*10^23 atoms of O
13.
2.03*10^23 atoms of Al
Test 10.3
Удалить1. aluminum - 2
sulfur - 3
oxygen - 12
2. A hydrate can usually be converted to its anhydrous form by heating.
3. a) C4H9
b) HO
c) NO2
d)C5H12
4. In many cases, the molecular formula is the same as the empirical formula. For example, the molecular formula of methane is CH4, and, because 1:4 is the smallest whole-number ratio that can be written for this compound, that is also its empirical formula. Sometimes, however, the molecular formula is a simple whole-number multiple of the empirical formula. Acetic acid is an organic acid that gives vinegar its distinctive taste and smell. Its molecular formula is C2H4O2. Glucose is a simple sugar that cells use as their primary source of energy. Its molecular formula is C6H12O6. They are very different compounds, yet both have the same empirical formula, CH2O.
5. SiO2
6. а) К - 33% Br - 67%
b) N - 26% H - 7% Cl - 67%
c) C - 62% H - 10% O - 28%
d) Ba - 68% P - 10% O - 22%
7. a) 1,4 g
b) 84,42 g
c) 25,42 g
d) 3,96 g
8. Li3N
9. а) 44%
b) 29%
10. a) ClF3
b) SrCO3
11. a)C4H8O4
b)C6H3Cl3
12. N2O4
13. a)4,51 g
b)0,25 mol
c) 0,05 mol
d) CuSO4*5H2O
Диктант 93%
УдалитьGrammar test 74%
УдалитьПАВЛЕНКО ПОЛИНА
ОтветитьУдалитьREADING:
Test 1:
1. Avogadro’s number, number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.022140857 × 10^23. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction (if any).
2. an unit; an unit; a molecule; a molecule.
3. 4; 2; 9.
4. A mole of any substance contains Avogadro’s number (6.02 × 1023) of representative particles.; One mole of water contains Avogadro’s number of molecules.
5. 69,72 g/mol.
6. 2,35*10^22; 22,4*10^23; 48,2*10^23; 8,13*10^19.
7. 5,16; 0,013.
8. 1,5*10^24.
9. 137,33g/mol; 100,0869g/mol; 399,88g/mol; 325,2880 g/mol.
10. 5 carbon atoms.
GRAMMAR TEST: 91% (ошибки в номерах 7, 26, 37, 47, 65)
1. c; 2. a; 3. b; 4. c; 5. a; 6. b; 7. a; 8. a; 9. d; 10. a; 11. a; 12. b; 13. d; 14. d; 15. b; 16. d; 17. c; 18. a; 19. c; 20. b. 21. off; 22. up; 23. across; 24. for; 25. up; 26. to; 27. of; 28. of; 29. by; 30. of;
31. In spite of her wealth, she’s not very happy.
32. June doesn’t work as hard as Terry.
33. He needn’t have paid me.
34. He had never seen a dolphin before.
35. No other player is as good as Colin.
36. so strong;
37. hadn’t been;
38. was hit on;
39. so as not to;
40. although;
41. was; 42. was laughed; 43. had been; 44. has recently been advised; 45. will tease;
46.Ted has had new windows put in by a carpenter.
47. Tommy has had washed clothes by his mother.
48. She may have her hair permed tomorrow.
49. Lord is having his shoes cleaned at the moment.
50. James had his car repaired by the mechanic.
51. They arrived home early this evening.
52. Look at the beautiful black alsatian police dog!
53. She bought an expensive new black silk dress.
54. All night the dog barked noisily in the garden.
55. I’d like a big medium rare steak please.
56. He’s almost never late for work.
57. She’s often the last student to finish the test.
58. I probably won’t see James until tomorrow.
59. He nearly always runs all the way to school.
60. I think these exercises are extremely difficult.
61. He apologise for being so angry the night before.
62. He denied telling them Tom’s secret.
63. She complained that her husband was always forgetting wedding anniversary.
64. He suggested that they have a quiet night at home for a change.
65. He informed that he has helped her with the housework as long as she did the washing-up.
Test 1
ОтветитьУдалить.The number 6.02 × 1023 is called Avogadro’s number, the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of pure elements, the representative particle is the atom.
2.a.unit
b.unit
c .molecule
d.molecule
3.4,2,9
4.a.A mole of any substance contains the same number of representative particles.
b.One mole of water contains Avogadro’s number of molecules.
5.69,72 g/mol
6.a.2,35*10^22
b.2,24*20^25
c.4,82*10^25
d.8,13*10^20
7.a.0,52 mol
b.0,013 mol
8.1,5*10^24 atoms
9.a.158g/mol
b.220g/mol
c.400 g/mol
d.325 g/mol
10.5
Grammar test
ОтветитьУдалить1)C
2)A
3)B
4)A
5)B
6)B
7)B
8)А
9)D
10)A
11)A
12)B
13.)D
14)D
15)B
16)D
17)C
18)A
19)A
20)B
B)
21)off
22)up
23)across
24)for
25)up
C)
26)with
27)of
28)of
29)by
30)of
D)
31)in spite of the fact that she’s rich , she isn’t happy
32) June doesn’t work as hard as terry
33) he needn’t have paid me
34) he had never seen a dolphin before
35) no other chess player is as good as Collin
E)
36) so strong
37) had forgotten
38) was hit on the
39) so as no to
40) al thought
F)
41)was
42) was laughter at
43) had been
44) had recently been advised
45) will tease
G)
46)Ted has had a new window put in by a carpenter
47) Tommy has his clothes washed for him by his mother
48) she may had her hair permed tomorrow
49)Lord Sutcliffe is having his shoes cleaned at the moment
50) James had his car repaired by the mechanic
H)
51)At this evening they arrived home early
52) look at that beautiful black Alsatian police dog
53) she bought an expensive new black silk dress
54) all night the dog barked noisily in the garden
55) I’d like a big medium rare steak please
56) he is almost never late for work
57) she is often time the last student to finish the test
58) I probably won’t see James until tomorrow
59) he nearly always runs all the way r to school
60) I think these are extremely difficult
I)
61 he is so apologized for being so angry the night before night
62) he denied telling them Toms secret
63) she complained that her husband was always forgetting their wedding anniversary and added that he never remembered her birthday either
64) he suggested having quiet night at home for a change
65₽ he agreed to help her with the housework as long as she did the walking up
Listening
ОтветитьУдалитьStart with school supplies, don't just empty your backpack into the garbage at the end of the year. Reuse you binders, use partial notebooks for notes or other purposes. Locate all your office/school supplies in one place so you don't have to buy things you already have. Buy a plain backpack so you can use it for several years, you can decorate it with pins or key chains if you want to embellish. Use both sides of paper, print only the pages you need. When you need to purchase supplies look for recycled content, an non chlorine bleach paper.
Eat less meat, and more local, organic in season produce. Help make meals at home so you don't need to purchase so many packaged or take out meals. Pack a waste free lunch.
Buy fewer clothes and look for organic cotton or other natural materials. Donate used clothes instead of tossing them in the garbage. You can also organize a clothing swap so you can change your wardrobe without spending any money.
Conserve energy, many teens have several electronics and many use energy even when they are off. Plug everything into a power strip so you can shut everything off when you leave the house or go to sleep.
Walk or ride a bike to school, friends houses, practice the mall etc. If you have to have a parent drive you to or from school arrive 15 minutes early and ask them to pick you up 15 minutes later, that will reduce the amount of time they have to wait with the engine running.
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ОтветитьУдалитьGrammar test-80%
Grammar test 80%
ОтветитьУдалитьTest 10.1
ОтветитьУдалить1. The number 6.02 × 1023 is called Avogadro’s number, the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of pure elements, the representative particle is the atom.
2. a.unit
b.unit
c .molecule
d.molecule
3. 4,2,9
4. a.A mole of any substance contains the same number of representative particles.
b.One mole of water contains Avogadro’s number of molecules.
5. 69,72 g/mol
6. a.2,35*10^22
b.2,24*20^25
c.4,82*10^25
d.8,13*10^20
7. a.0,52 mol
b.0,013 mol
8. 1,5*10^24 atoms
9. a.137 g/mol
b.197 g/mol
c.400 g/mol
d.325 g/mol
10. 5
Grammar test - 81%
ОтветитьУдалитьTest 10.2
ОтветитьУдалить1) A similar conversion factor based on molar mass can be used to convert the mass of a known substance to moles. In a laboratory situation, you might perform a reaction and produce a certain amount of a product. It will often be necessary to then determine the number of moles of the product that was formed, but this cannot be measured directly. However, you can use a balance to measure the mass of the product, and the number of moles can be easily calculated. The next Sample Problem illustrates this situation.
2) Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible. A given volume of a gas with small light particles, such as hydrogen (H2), contains the same number of particles as the same volume of a heavy gas with larger particles, such as sulfur hexafluoride (SF6).
3) Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure.
4) a. increase
b. decrease
5) a. 0.50 mol of CH4
b. 1.0 mol of HCL
c. 1.0 mol of HCL
d. the same
6) a. 0.76 mol
b. 0.71 mol
c. 1.56 mol
d. 12.88 mol
e. 22.9 mol
f. 0.058 mol
7) a. 76.8 g
b. 0.98 g
c. 2623 g
d. 324 g
e. 15.6 g
f. 0.69 g
g. 11.03 g
8) a. 62.27 L
b. 7.06 L
c. 339.2 L
d. 3.7 L
e. 15.3 L
f. 3.45 L
9) a. 56.68*10^23 atoms
b. 5.04*10^23 molecules
c. 0.048*10^23 formula units
d. 0.0067*10^23 atoms
10) a. 3.125 g/L
b. 0.18 g/L
11) M=46 g/mol
NO2
12) 2.09*10^23 atoms of C
13.68*10^23 atoms of H
1.71*10^23 atoms of O
13) 2.03*10^23 atoms of Al
Grammar test - 78%
ОтветитьУдалитьTest 10.1
ОтветитьУдалить1. The number 6.02 × 1023 is called Avogadro’s number, the number of representative particles in a mole.
2. barium chloride - formula unit
silicon -- atom
nitrogen gas -- molecule
water -- molecule
3. KClO4 -- 4
CH3COOH -- 2
Al(NO3)3 -- 9
4. a. A mole of any substance contains the same number of representative particles.
b. One mole of water contains Avogadro’s number of molecules.
5. 69,72 g/mol
6. a. 2,35*10^22
b. 2,24*20^25
c. 4,82*10^25
d. 8,13*10^20
7. a. 0,52 mol
b. 0,013 mol
8. 1,5*10^24 atoms
9. a. 137 g/mol
b. 197 g/mol
c. 400 g/mol
d. 325 g/mol
10. There are five carbon atoms are in the formula of this compound.
Test 10.2
Удалить1) A similar conversion factor based on molar mass can be used to convert the mass of a known substance to moles.
2) Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible.
3) Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure.
4) A. When the temperature is increased, the molar volume is increased.
B. When the external pressure exerted on the gas is increased, the molar volume is decreased.
5) a. CH4
b. HCl
c. HCl
d. HCl
6) a. 0.76 mol
b. 0.71 mol
c. 1.56 mol
d. 12.88 mol
e. 22.9 mol
f. 0.058 mol
7) a. 76.8 g
b. 0.98 g
c. 2623 g
d. 324 g
e. 15.6 g
f. 0.69 g
g. 11.03 g
8) a. 62.27 L
b. 7.06 L
c. 339.2 L
d. 3.7 L
e. 15.3 L
f. 3.45 L
9) a. 56.68*10^23 atoms
b. 5.04*10^23 molecules
c. 0.048*10^23 formula units
d. 0.0067*10^23 atoms
10) a. 3.125 g/L
b. 0.18 g/L
11) M=46 g/mol
The formula is NO2
12) 2.09*10^23 atoms of C
13.68*10^23 atoms of H
1.71*10^23 atoms of O
13) 2.03*10^23 atoms of Al
Test 10.1
ОтветитьУдалить1.Avogadro's number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale. Avogadro's number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance
2.a.unit
b.unit
c .molecule
d.molecule
3.4,2,9
4.4.a.A mole of any substance contains the same number of representative particles.
b.One mole of water contains Avogadro’s number of molecules.
5.69,72 g/mol
6.a.2,35*10^22
b.2,24*20^25
c.4,82*10^25
d.8,13*10^20
7.a.0,52 mol
b.0,013 mol
8.1,5*10^24 atoms
9.a.137 g/mol
b.197 g/mol
c.400 g/mol
d.325 g/mol
10.5
Test 10.2
Удалить1) A similar conversion factor based on molar mass can be used to convert the mass of a known substance to moles.
2)Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible.
3)Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure.
4) a. increase
b. decrease
5)a. CH4
b. HCl
c. HCl
d. Hcl
6) a. 0.76 mol
b. 0.71 mol
c. 1.56 mol
d. 12.88 mol
e. 22.9 mol
7)a. 76.8 g
b. 0.98 g
c. 2623 g
d. 324 g
e. 15.6 g
f. 0.69 g
g. 11.03 g
8)a. 62.27 L
b. 7.06 L
c. 339.2 L
d. 3.7 L
e. 15.3 L
f. 3.45 L
9) a. 56.68*10^23 atoms
b. 5.04*10^23 molecules
c. 0.048*10^23 formula units
d. 0.0067*10^23 atoms
10) a. 3.125 g/L
b. 0.18 g/L
11)M=46 g/mol
NO2
12)2.09*10^23 atoms of C
13.68*10^23 atoms of H
1.71*10^23 atoms of O
13)2.03*10^23 atoms of Al
Test 10.3
Удалить1) aluminum - 2
sulfur - 3
oxygen – 12
2)A hydrate can usually be converted to its anhydrous form by heating.
3)a. C4H9
b. HO
c. NO2
d. C5H12
4)The empirical formula of a compound refers to the simplest ratio of elements that can be obtained from the chemical formula of the compound.
The molecular formula shows the actual number of atoms of each of the elements in a compound.
5)46,7 % Si ; 53,3 % O
6).a.32,7% K;67,3 % Br
b.26% N; 66% Cl;8% H
c.62% C;28% O;10% H
d.68% Ba ;10%P;22 % O
7)a.1,35 g K
b.83 g Cl
c.25,4 g C
d.3,96 g P
8)Li3N
9)44%, 29%
10) a.F2Cl3
b.SrC7O2
11)a. C4H8O4
b. C6H3Cl3
12). N2O4
13)a. 4,51 g
b. 0,25 mol
c. 0,05 mol
d. CuSO4*5H2O
Алимханова
ОтветитьУдалитьTest 10.1
1.The number 6.02 × 1023 is called Avogadro’s number, the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of pure elements, the representative particle is the atom.
2.a. unit
b. unit
c. molecule
d. molecule
3. 4,2,9
4. a. A mole of any substance contains the same number of representative particles.
b.One mole of water contains Avogadro’s number of molecules.
5. 69,72 g/mol
6. a. 2,35*10^22
b. 2,24*20^25
c. 4,82*10^25
d. 8,13*10^20
7. a. 0,52 mol
b. 0,013 mol
8. 1,5*10^24 atoms
9. a. 137 g/mol
b. 197 g/mol
c. 400 g/mol
d. 325 g/mol
10. 5
Алимханова
УдалитьTest 10.2
1. A similar conversion factor based on molar mass can be used to convert the mass of a known substance to moles. In a laboratory situation, you might perform a reaction and produce a certain amount of a product. It will often be necessary to then determine the number of moles of the product that was formed, but this cannot be measured directly. However, you can use a balance to measure the mass of the product, and the number of moles can be easily calculated. The next Sample Problem illustrates this situation.
2. Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible. A given volume of a gas with small light particles, such as hydrogen (H2), contains the same number of particles as the same volume of a heavy gas with larger particles, such as sulfur hexafluoride (SF6).
3. Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure.
4. a. increase
b. decrease
5. a. 0.50 mol of CH4
b. 1.0 mol of HCL
c. 1.0 mol of HCL
d. the same
6. a. 0.76 mol
b. 0.71 mol
c. 1.56 mol
d. 12.88 mol
e. 22.9 mol
f. 0.058 mol
7. a. 76.8 g
b. 0.98 g
c. 2623 g
d. 324 g
e. 15.6 g
f. 0.69 g
g. 11.03 g
8. a. 62.27 L
b. 7.06 L
c. 339.2 L
d. 3.7 L
e. 15.3 L
f. 3.45 L
9. a. 56.68*10^23 atoms
b. 5.04*10^23 molecules
c. 0.048*10^23 formula units
d. 0.0067*10^23 atoms
10. a. 3.125 g/L
b. 0.18 g/L
11. M=46 g/mol
NO2
12. 2.09*10^23 atoms of C
13.68*10^23 atoms of H
1.71*10^23 atoms of O
13. 2.03*10^23 atoms of Al
Алимханова
ОтветитьУдалитьTest 10.3
1. aluminum - 2
sulfur - 3
oxygen - 12
2. A hydrate can usually be converted to its anhydrous form by heating.
3. a. C4H9
b. HO
c. NO2
d. C5H12
4. In many cases, the molecular formula is the same as the empirical formula. For example, the molecular formula of methane is CH4, and, because 1:4 is the smallest whole-number ratio that can be written for this compound, that is also its empirical formula. Sometimes, however, the molecular formula is a simple whole-number multiple of the empirical formula. Acetic acid is an organic acid that gives vinegar its distinctive taste and smell. Its molecular formula is C2H4O2. Glucose is a simple sugar that cells use as their primary source of energy. Its molecular formula is C6H12O6. They are very different compounds, yet both have the same empirical formula, CH2O.
5. SiO2
6. а. К - 33% Br - 67%
b. N - 26% H - 7% Cl - 67%
c. C - 62% H - 10% O - 28%
d. Ba - 68% P - 10% O - 22%
7. a. 1,4 g
b. 84,42 g
c. 25,42 g
d. 3,96 g
8. Li3N
9. а. 44%
b. 29%
10. a. ClF3
b. SrCO3
11. a. C4H8O4
b. C6H3Cl3
12. N2O4
13. a. 4,51 g
b. 0,25 mol
c. 0,05 mol
d. CuSO4*5H2O
Grammar test 77%
ОтветитьУдалитьTest 10.2
ОтветитьУдалить1.molar mass
2.Equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible.
3.Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure. Standard temperature and pressure (STP) is defined as 0°C (273.15 K) and 1 atm of pressure. The molar volume of a gas is the volume of one mole of the gas at a given temperature and pressure. At STP, one mole (6.02 × 1023 representative particles) of any gas occupies a volume of 22.4 L .
4.a.When a gas is heated, its molecules move faster and the gas expands.
b.When put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas.
5.a.CH4 b.HCl c.HCl d.the same volume
6.a.0,76 mol b.0,42 mol c.1.56 mol d.0,013 mol e.22,9 mol f.0,058 mol
7.a.76,8 g b.0,98 g c.2623 g d.35,1 g e.2586 g f.30,25 g g.485 g
8.a.61,6 l b.7,056 l c.169,6 l d.3,696 l e.0,125 l f.2,9 l
9.a.5,66*10^24 b.5,04*10^23 c.4,84*10^21 d.6,7*10^23
10.a.3,169 g/L b.0,178 g/L
11.46 g/mol NO2
12.7,33*10^21 C ,4*10^22 H, 8*10^22 O
13.3,65*10^24
Test 10.3
ОтветитьУдалить1.2 Al,12 O,2 S
2.A hydrate can usually be converted to its anhydrous form by heating.
3.C4H9,HO,NO2,C5H12
4.An empirical formula is one that shows the lowest whole-number ratio of the elements in a compound.A molecular formula and represents the true molecular structure.
5.46,7 % Si And 53,3 % O
6.a.32,7% K,67,3 % Br
b.26% N, 66% Cl,8% H
c.62% C,28% O,10% H
d.68% Ba ,10%P,22 % O
7.a.1,35 g K
b.83 g Cl
c.25,4 g C
d.3,96 g P
8.Li3N 40%
9.44%, 29%
10.F2Cl3, SrC7O2
11.C4H8O4,C6H3Cl3
12.N2O4
13. a. 4,51 g
b. 0,25 mol
c. 0,05 mol
d. CuSO4*5H2O
Алимханова
ОтветитьУдалитьI think that it's dufficult to save our planet and to make a change but we can help the environment by using less plastic stuff. We can use glass, metal or natural fabric instead of plastic.
Алимханова
УдалитьHow can I help the environment? Nowadays it is very important question for humans.
Plastic is a marvellous invention that has given us so much. But we are beginning to realise it's causing many long-lasting environmental problems.
If you have a lot of something, you can decant it to smaller containers, that is, you can transfer it to those other containers to make it easier to use. For example: I buy huge bottles of liquid soap and decant it into smaller dispensers for the kitchen and bathrooms. So that’s one area where we can all be a bit more environmentally friendly.
Secondly, I pass things on. The hand-me-down, pass-thing-on culture is really, really important in the world and there are lots of things that can be passed down. It’s saving someone else money. Most of these things are in good nick when we need to pass them on.
Only together we can save our planet. Small steps always matter.
МАМОНТОВА МАРИЯ
ОтветитьУдалитьTest 10.1
1) The number 6.02 × 10^23 is called Avogadro’s number, the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of pure elements, the representative particle is the atom. Samples of pure iron, carbon, and helium consist of individual iron atoms, carbon atoms, and helium atoms, respectively. Seven elements exist in nature as diatomic molecules (H2, N2, O2, F2, Cl2, Br2, and I2), so the representative particle for these elements is the molecule.
2) a) formula unit b)unit c )molecule
d)molecule
3.4,2,9
4. а)A mole is the amount of a substance that contains 6.02 × 1023 representative particles of that substance. The mole is the SI unit for amount of a substance. Just like the dozen and the gross, it is a name that stands for a number.
b)There are therefore 6.02 × 10^23 water molecules in a mole of water molecules.
5.69,72 g/mol
6.a)2,35*10^22
b)2,24*20^25
c) 4,82*10^25
d) 8,13*10^20
7.a) 0,52 mol
b) 0,013 mol
8.1,5*10^24 atoms
9.a) 137 g/mol
b) 197 g/mol
c) 400 g/mol
d) 325 g/mol
10.5
МАМОНТОВА МАРИЯ
УдалитьTest 10.2
It will often be necessary to then determine the number of moles of the product that was formed, but this cannot be measured directly. However, you can use a balance to measure the mass of the product, and the number of moles can be easily calculated.
2. Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible. A given volume of a gas with small light particles, such as hydrogen (H2), contains the same number of particles as the same volume of a heavy gas with larger particles, such as sulfur hexafluoride (SF6).
3.Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure.
4.
a ) increase
b) decrease
5. a)0.50 mol of CH4
b) 1.0 mol of HCL
c) 1.0 mol of HCL
d) the same
6. a) 0.76 mol
b) 0.71 mol
c) 1.56 mol
d) 12.88 mol
e) 22.9 mol
f) 0.058 mol
7. a) 76.8 g
b) 0.98 g
c) 2623 g
d) 324 g
e) 15.6 g
f) 0.69 g
g) 11.03 g
8. a) 62.27 L
b) 7.06 L
c) 339.2 L
d) 3.7 L
e) 15.3 L
f) 3.45 L
9. a.)56.68*10^23 atoms
b) 5.04*10^23 molecules
c.) 0.048*10^23 formula units
d) 0.0067*10^23 atoms
10. a)3.125 g/L
b) 0.18 g/L
11. M=46 g/mol NO2
12.
2.09*10^23 atoms of C
13.68*10^23 atoms of H
1.71*10^23 atoms of O
13.
2.03*10^23 atoms of Al
МАМОНТОВА МАРИЯ
УдалитьTest 10.3
1) aluminum - 2
sulfur - 3
oxygen - 12
2) A hydrate can usually be converted to its anhydrous form by heating.
3) a. C4H9
b. HO
c. NO2
d. C5H12
4) In many cases, the molecular formula is the same as the empirical formula. For example, the molecular formula of methane is CH4, and, because 1:4 is the smallest whole-number ratio that can be written for this compound, that is also its empirical formula. Sometimes, however, the molecular formula is a simple whole-number multiple of the empirical formula. Acetic acid is an organic acid that gives vinegar its distinctive taste and smell. Its molecular formula is C2H4O2. Glucose is a simple sugar that cells use as their primary source of energy. Its molecular formula is C6H12O6. They are very different compounds, yet both have the same empirical formula, CH2O.
5) SiO2
6) а. К - 33% Br - 67%
b. N - 26% H - 7% Cl - 67%
c. C - 62% H - 10% O - 28%
d. Ba - 68% P - 10% O - 22%
7) a. 1,4 g
b. 84,42 g
c. 25,42 g
d. 3,96 g
8)d. Li3N
9) а. 44%
b. 29%
10) a. ClF3
b. SrCO3
11) a. C4H8O4
b. C6H3Cl3
12) N2O4
13) a. 4,51 g
b. 0,25 mol
c. 0,05 mol
d. CuSO4*5H2O
МАМОНТОВА МАРИЯ
ОтветитьУдалитьGrammar test 70%
Test 10.1
ОтветитьУдалить1). The number 6.02 × 1023 is called Avogadro’s number, the number of representative particles in a mole. It is an experimentally determined number. A representative particle is the smallest unit in which a substance naturally exists. For the majority of pure elements, the representative particle is the atom. 2).a.unit
b.unit
c .molecule
d.molecule
3).4,2,9
4).a.A mole of any substance contains the same number of representative particles.
b.One mole of water contains Avogadro’s number of molecules.
5).69,72 g/mol
6).a.2,35*10^22
b.2,24*20^25
c.4,82*10^25
d.8,13*10^20
7).a.0,52 mol
b.0,013 mol
8).1,5*10^24 atoms
9).a.137 g/mol
b.197 g/mol
c.400 g/mol
d.325 g/mol
10. 5
Grammar test - 74%
Удалить1. It will often be necessary to then determine the number of moles of the product that was formed, but this cannot be measured directly. However, you can use a balance to measure the mass of the product, and the number of moles can be easily calculated.
Удалить2. Avogadro’s hypothesis states that equal volumes of all gases at the same temperature and pressure contain equal numbers of particles. Since the total volume that a gas occupies is primarily composed of the empty space between the particles, the actual size of the particles themselves is nearly negligible. A given volume of a gas with small light particles, such as hydrogen (H2), contains the same number of particles as the same volume of a heavy gas with larger particles, such as sulfur hexafluoride (SF6).
3.Gases are compressible, meaning that when put under high pressure, the particles are forced closer to one another. This decreases the amount of empty space and reduces the volume of the gas. Gas volume is also affected by temperature. When a gas is heated, its molecules move faster and the gas expands. Because of the variation in gas volume due to pressure and temperature changes, gas volumes must be compared at the same temperature and pressure.
4.
a ) increase
b) decrease
5. a)0.50 mol of CH4
b) 1.0 mol of HCL
c) 1.0 mol of HCL
d) the same
6. a) 0.76 mol
b) 0.71 mol
c) 1.56 mol
d) 12.88 mol
e) 22.9 mol
f) 0.058 mol
7. a) 76.8 g
b) 0.98 g
c) 2623 g
d) 324 g
e) 15.6 g
f) 0.69 g
g) 11.03 g
8. a) 62.27 L
b) 7.06 L
c) 339.2 L
d) 3.7 L
e) 15.3 L
f) 3.45 L
9. a.)56.68*10^23 atoms
b) 5.04*10^23 molecules
c.) 0.048*10^23 formula units
d) 0.0067*10^23 atoms
10. a)3.125 g/L
b) 0.18 g/L
11. M=46 g/mol NO2
12.
2.09*10^23 atoms of C
13.68*10^23 atoms of H
1.71*10^23 atoms of O
13.
2.03*10^23 atoms of Al