Здравствуйте, уважаемые студенты! Последние две недели семестра 09.12.2019 - 19.12.2019 - зачётные. Необходимо сдать тесты, темы, тексты.
Студенты: Алимханова Л., Корупаева Е., Масленников А., Тихомиров А., Шишкинская В., Машкова С., Голикова С., Корягина П., Голубева В., Власкина Е., Дёмина Ю., Вахрушева Д., Панкова С., Харитонов А., Горохова В. - зачёт принят автоматом по результатам посещения, выполнения аудиторной работы, а также домашних заданий.
Все остальные учащиеся - выполнить все задания в блоге (начиная с первого занятия!), прийти в аудиторию и сдать темы и перевод; тесты можно выполнить в блоге.
Работа в блоге продолжается до конца семестра!
1) Grammar - FCE TEST 4 (Reading/Use of English/Listening) - материалы см. в теме блога FCE Listening - 10:55 (начало) - https://www.driveplayer.com/#fileIds=0B0qa_oOXAvLOVE50dTVHTVVuSW8&userId=115601731422341242067 -
2) Text Book - https://www.ck12.org/book/CK-12-Chemistry-Intermediate/section/12.0/ - чтение/слова/перевод/тесты
3) Слова - составить 25 своих предложений используя лексику с 1 по 5 страницы
Студенты: Алимханова Л., Корупаева Е., Масленников А., Тихомиров А., Шишкинская В., Машкова С., Голикова С., Корягина П., Голубева В., Власкина Е., Дёмина Ю., Вахрушева Д., Панкова С., Харитонов А., Горохова В. - зачёт принят автоматом по результатам посещения, выполнения аудиторной работы, а также домашних заданий.
Все остальные учащиеся - выполнить все задания в блоге (начиная с первого занятия!), прийти в аудиторию и сдать темы и перевод; тесты можно выполнить в блоге.
Работа в блоге продолжается до конца семестра!
1) Grammar - FCE TEST 4 (Reading/Use of English/Listening) - материалы см. в теме блога FCE Listening - 10:55 (начало) - https://www.driveplayer.com/#fileIds=0B0qa_oOXAvLOVE50dTVHTVVuSW8&userId=115601731422341242067 -
2) Text Book - https://www.ck12.org/book/CK-12-Chemistry-Intermediate/section/12.0/ - чтение/слова/перевод/тесты
3) Слова - составить 25 своих предложений используя лексику с 1 по 5 страницы
1.Hund's rule is perfectly illustrated by people on the bus who don"t want to seat next to each other.
ОтветитьУдалить2.The periodic table can help you predict chemical and physical properties of elements that haven"t even been discovered yet.
3.Some unique properties of water can be explained by the strong hydrogen bond.
4.You need to be very precisely when you carry out experiments in analytical chemistry.
5.Before even starting the experiments,scientists propose a hypothesis.
6.One metal that is liquid under "normal conditions" is mercury.
7.In experiments you don't really use liters or kilograms of matter because you need only small quantities.
8.In food industry emulgators are used to create a homogeneous mixture.
9. Atomic emission spectrum is usually used to define the chemical compound.
10.Depending on the element, it can gain or loose valence electons.
11.Halogens are duatomic molecules.
12.Noble gases usually don't react with any other elements.
13.During the process of electrolysis anions go to the anode.
14.Cations usually go into the solution quicker then anions.
15.Lone pairs of electrons change the dimentional structure of the substance.
16.Water is the best example for a dipole.
17.A pi bond is usually found in compounds with a double or triple bond.
18.Van der Waals forces are very critical in many processes.
19.A lot of scientific laws changed during history.
20.Chemists need to wear special face masks if they are working with dangerous gases.
21.If the substance changes shape or form, it can be called a physical change.
22. In order for a chemical change to happen , you need to know in what quantities to mix the substances.
23.The results of the experiment can change a lot because of the temperature.
24.You will have different mass and weight on Earth and on the Moon.
25.Sometimes you can see the organic phase because of the different density.
Grammar test 4
ОтветитьУдалитьReading 94%
Listening 93%
Use of English 83%
Алимханова
ОтветитьУдалитьGrammar test 4
Reading 83%
Listening 93%
Use of English 91%
12.1
ОтветитьУдалить1.a)2 molecules of ethane react with 7 molecules of oxygen to form 6 molecules of water and 4 molecules of carbon dioxide.
b) 2 moles of ethane react with 7 moles of oxygen to form 6 moles of water and 4 moles of carbon dioxide.
c.mass of ethane =60 g
mass of oxygen =224 g
mass of water =108 g
mass of carbon dioxide=176 g
284 g=284 g
2.a.2:7 b .2:3 c.1:2
3. 3Ca+N2=Ca3N2
4.68 tires,34 headlights,17 steering wheels,102 spark plugs
5.a.0,89 moles b.0,96 moles c.0,00964 moles
6.a.4 moles b.0,54 moles c.6,03 moles d.3,42 moles ;3,42 moles of water, 2,85 moles of nitrogen
7.Al+3Ag NO3= Al(NO3)3+ 3Ag
1,836 moles
12.2 Test
ОтветитьУдалить1.a.2 b.1 c.3 d.2
2.Because both types of problems involve a conversion from either moles of gas to volume or vice-versa, we can use the molar volume of 22.4 L/mol as a conversion factor if the reaction is run at STP.
3.a.1,14 moles b.0,1246 moles c.0,01 moles of AgNO3,0,05 moles of CaCl2
4.a.0,78502 moles b.101,33 g c.27,12 g
5.a.2,7625 liters b.182,25 liters c.31 liters of water, 24,8 liters of carbon dioxide
6.a.2,15 liters b.218,67 g c.40,6 g of CaCO3 and 9,09 liters of CO2
7.a.0,058 g b.604,8 liters c.7,15 liters
8.a.3,47*10^(23) b. 234 liters c.0,458 moles
9.83 %
Part 12.3
ОтветитьУдалить1.The limiting reactant (or limiting reagent) is the reactant that determines the amount of product that can be formed in a chemical reaction.
2.limiting reactant
3.Besides spills and other experimental errors, there are usually losses due to incomplete reactions, undesirable side reactions, and numerous other factors.
4.Percent yields are generally less than 100% because of the reasons indicated earlier. However, percent yields that appear to be greater than 100% are possible if the measured product of the reaction contains impurities that add to the mass of the pure product.
5.a.lithium b. 0,057 moles c. 0,246 moles
6.a.F2 b.6,171 g c. 25,168 g N2F4 and 29,04 of HF d.64,4%
7.a.K b.1,0976 liters of O2 c.31,772 g
8.46,3 g
9.97,2 g
10.2,285 kg
Алимханова
ОтветитьУдалитьChapter 12
Part 1.
1.a. 2 molecules of ethane react with 7 molecules of oxygen to form 6 molecules of water and 4 molecules of carbon dioxide.
b. 2 moles of ethane react with 7 moles of oxygen to form 6 moles of water and 4 moles of carbon dioxide.
c. mass of ethane =60 g
mass of oxygen =224 g
mass of water =108 g
mass of carbon dioxide=176 g
284 g=284 g
2. a. 2:7
b. 2:3
c.1:2
3. 3Ca+N2=Ca3N2
4.68 tires, 34 headlights, 17 steering wheels, 102 spark plugs
5. a. 0,89 moles
b. 0,96 moles
c. 0,00964 moles
6. a. 4 moles
b. 0,54 moles
c. 6,03 moles
d. 3,42 moles; 3,42 moles of water, 2,85 moles of nitrogen
7. Al + 3Ag NO3 = Al(NO3)3 + 3Ag
1,836 moles
Алимханова
ОтветитьУдалитьChapter 12
Part 2
1. a. 2
b. 1
c. 3
d. 2
2. Because both types of problems involve a conversion from either moles of gas to volume or vice-versa, we can use the molar volume of 22.4 L/mol as a conversion factor if the reaction is run at STP.
3. a. 1,14 moles
b. 0,1246 moles
c. 0,01 moles of AgNO3, 0,05 moles of CaCl2
4. a. 0,78502 moles
b.101,33 g
c. 27,12 g
5. a. 2,7625 liters
b.182,25 liters
c. 31 liters of water, 24,8 liters of carbon dioxide
6. a. 2,15 liters
b. 218,67 g
c. 40,6 g of CaCO3 and 9,09 liters of CO2
7. a. 0,058 g
b. 604,8 liters
c. 7,15 liters
8. a. 3,47*10^(23)
b. 234 liters
c. 0,458 moles
9. 83 %
Алимханова
ОтветитьУдалитьChapter 12
Part 3
1. The limiting reactant (or limiting reagent) is the reactant that determines the amount of product that can be formed in a chemical reaction.
2. limiting reactant
3. Besides spills and other experimental errors, there are usually losses due to incomplete reactions, undesirable side reactions, and numerous other factors.
4. Percent yields are generally less than 100% because of the reasons indicated earlier. However, percent yields that appear to be greater than 100% are possible if the measured product of the reaction contains impurities that add to the mass of the pure product.
5. a. lithium
b. 0,057 moles
c. 0,246 moles
6. a. F2
b. 6,171 g
c. 25,168 g N2F4 and 29,04 of HF
d. 64,4%
7. a. K
b.1,0976 liters of O2
c. 31,772 g
8. 46,3 g
9. 97,2 g
10. 2,285 kg
Алимханова
ОтветитьУдалить25 предложений (1-5)
1. Analytical chemistry consists of classical, wet chemical methods and modern, instrumental methods.
2. Microscopic scale is sometimes regarded as the scale between the macroscopic scale and the quantum scale.
3. In comparative experiments, members of a control group receive a standard treatment, a placebo, or no treatment at all.
4. Physical properties of materials and systems can often be categorized as being either intensive or extensive, according to how the property changes when the size (or extent) of the system changes.
5. A pure substance participates in a chemical reaction to form predictable products.
6. Pure water is a compound made from two elements - hydrogen and oxygen.
7. Filtration is used to separate particles and fluid in a suspension, where the fluid can be a liquid, a gas or a supercritical fluid.
8. The cars of a roller coaster reach their maximum kinetic energy when at the bottom of the path.
9. The density of a material varies with temperature and pressure.
10. Converting units using dimensional analysis makes working with large and small measurements more convenient.
11. Many scientists and thinkers made discoveries and conducted experiments to arrive at the currently accepted atomic model.
12. The neutron release generated by a nuclear fusion reaction is intentionally allowed to escape the weapon, rather than being absorbed by its other components.
13. The atomic mass of an isotope and the relative isotopic mass refers to a certain specific isotope of an element.
14. Electromagnetic radiation has properties in common with other forms of waves such as reflection, refraction, diffraction, and interference.
15. Gamma rays, though generally of somewhat higher frequency than X rays, have basically the same nature.
16. Quantum mechanics cannot predict the exact location of a particle in space, only the probability of finding it at different locations.
17. The easiest way to create electron configurations is using an electron configuration table, which is a way of writing down the various orbitals available to electrons.
18. Valence electrons are of crucial importance because they lend deep insight into an element’s chemical properties.
19. Metalloids have a metallic appearance, but they are brittle and only fair conductors of electricity.
20. All of the noble gases have full outer shells with eight electrons.
21. If the charge in an organic ion is formally centred on a carbon, it is termed a carbocation (if positively charged) or carbanion (if negatively charged).
22. Ionization energy is in indicator of reactivity.
23. Descriptive inorganic chemistry focuses on the classification of compounds based on their properties.
24. The study of organic chemistry overlaps organometallic chemistry and biochemistry, but also with medicinal chemistry, polymer chemistry, and materials science.
25. H2SO4 is not a binary acid, because it contains three different elements.
ПАВЛЕНКО ПОЛИНА
ОтветитьУдалить12.1
1. 2 molecules of ethane reacts with 7 molecules of oxygen to form 6 molecules of water and 4 molecules of carbon dioxide.; 2 moles of ethane react with 7 moles of oxygen to form 6 moles of water and 4 moles of carbon dioxide.; m(C2H6)=60,14, m(O2)=223,994, m(H2O)=108,06, m(CO2)=176,01.
2. a)2:7; b)2:3; c)1:2
3. Ca+N2=Ca3N2
4. 68 tires,34 headlights,17 steering wheels,102 spark plugs
5. a)0,89 moles; b)0,96 moles; c)0,00964 moles
6. a)4 moles; b)0,54 moles; c)6,03 moles; d)3,42 moles; 3,42 moles of water, 2,85 moles of nitrogen
7. Al+3Ag NO3= Al(NO3)3+ 3Ag; 1,836 moles
12.2
1. a. 2; b) 1; c) 3; d) 2
2. Both types of problems involve a conversion from either moles of gas to volume or vice-versa, we can use the molar volume of 22.4 L/mol as a conversion factor if the reaction is run at STP.
3. a)1,14 moles; b)0,1246 moles; c)0,01 moles AgNO3, 0,05 moles CaCl2
4. a) 0,78502 moles;b)101,33 g; c)27,12 g
5. a) 2,7625 liters; b)182,25 liters; c)31 liters H2O, 24,8 liters CO2
6. a) 2,15 liters; b) 218,67 g; c) 40,6 g CaCO3 and 9,09 liters CO2
7. a) 0,058 g; b) 604,8 liters; c) 7,15 liters
8. a) 3,47*10^(23); b) 234 liters; c) 0,458 moles
9. 83 %
12.3
1. The limiting reactant (or limiting reagent) is the reactant that determines the amount of product that can be formed in a chemical reaction.
2. limiting reactant
3. Besides spills and other experimental errors, there are usually losses due to incomplete reactions, undesirable side reactions, and numerous other factors.
4. Percent yields are generally less than 100% because of the reasons indicated earlier. However, percent yields that appear to be greater than 100% are possible if the measured product of the reaction contains impurities that add to the mass of the pure product.
5. a)lithium; b) 0,057 moles; c) 0,246 moles
6. a)F2; b)6,171 g; c) 25,168 g N2F4 and 29,04 HF; d)64,4%
7. a)K; b)1,0976 liters O2; c) 31,772 g
8. 46,3
9. 97,2
10. 2,285 kg
СЛОВА:
1. Hydrogen bond is weaker than a covalent or an ionic bond.
2. Resonance can produce strong vibrations.
3. Polar molecules attract water molecules, mainly through hydrogen bonding.
4. Liquid nitrogen is cold enough to cause severe frostbite.
5. A theory will never grow up into a law, though the development of one often triggers progress on the other.
6. The ratio of mass to volume is called density.
7. What is the highest temperature a man can have?
8. A liter is equal to 1000 cubic centimetres of water.
9. Computers can encounter either software errors.
10. Accuracy is how close a value is to its true value
11. Protons and neutrons are heavier than electrons and reside in the nucleus at the center of the atom.
12. Wavelength is inversely proportional to frequency .
13. Frequency is measured in the hertz unit.
14. All the alkali metals react directly with oxygen.
15. Nonmetals have nearly filled electron shells.
16. Fluorine is the most reactive of the halogens.
17. All the noble gases are present in Earth’s atmosphere
18. All acids release hydrogen ions into solutions.
19. Ions migrate under the influence of an electrical field.
20. Isoelectronicity may be used to predict the properties and reactions of a species.
21. Alloys are produced by melting the mixture of ingredients.
22. One of the ways we can express the size of atoms is with the atomic radius.
23. Oxoacids are acids that contain a hydrogen atom bonded to an oxygen atom.
24. Each electron in an atom is described by four different quantum numbers.
25. Metalloids are usually brittle, shiny solids.
1. The solid and liquid particulate matter emitted by man-made and natural sources could endanger health.
ОтветитьУдалить2. The control group is being monitored at present.
3. This latter independent variable is particularly relevant as regards mothers.
4. This hypothesis is supported by several studies and assessments.
5. The periodic table is a classic example of the scientific method at work.
6. Helium gas is colorless, odorless and nonflammable rare gas.
7. And the moment you expose this to light, you'll see an immediate physical change.
8. While heating, amber spreads pleasant aroma and produces vapor of amber acid.
9. The volume of network gas that leaks out during transport depends on many factors.
10. These chemical changes alter physical and biological processes.
11. We couldn't figure out the chemical formula.
12. A completely unknown molecular compound was found in her tissue.
13. High purity mercury is produced by distillation in many steps.
14. Sterile filtration of process air, nitrogen and other gases.
15. What is the unit of mass density used in the International System of Units (SI)?
16. The unit of measurement of energy is the Joule.
17. A shockwave carries a long distance without losing kinetic energy.
18. The cargo should be kept at one temperature during transport.
19. The conversion factor was below 50%.
20. The density of the air is dependent on the pressure, temperature and humidity.
21. In an atom, an electron doesn't exist between orbitals.
22. If we subtract one proton from mercury and three neutrons, we convert it into gold.
23. Plutonium from reactor spent fuel comes in mixtures of several isotopes.
24. Light is part of the electromagnetic spectrum.
25. Each element will have a different signature of light that it emits when heated, because it has a different configuration of electrons around the nucleus.
12.1
Удалить1. a) 2 molecules of ethane react with 7 molecules of oxygen to form 6 molecules of water and 4 molecules of carbon dioxide; b) 2 moles of ethane react with 7 moles of oxygen to form 6 moles of water and 4 moles of carbon dioxide; c) m(C2H6)=60 g; m(O2)=224 g; m(H2O)=108 g; m(CO2)=176 g; m(1,2)=m(3,4)=284 g.
2. a)2:7; b) 2:3; c) 1:2.
3. 3Ca+N2->Ca3N2.
4. 68 tires, 34 headlights, 17 steering wheel, and 102 spark plugs will be required to build 17 cars.
5. a) 0.89 moles of water are required; b)0.96 moles of hydrogen; c) 0.00964 moles of NaOH.
6. a) 4 moles of N2; b) 0.54 moles of NO; c) 6.03 moles of NH3; d) 3.42 moles of NO; 3.42 moles of H2O and 2.85 moles of N2 will be formed.
7. a) Al+3AgNO3-> 3Ag+Al(NO3)3; b)1.836 moles of silver will be produced.
12.2
Удалить1. a) 2; b) 1; c) 3; d) 2.
2. Because both types of problems involve a conversion from either moles of gas to volume or vice-versa, we can use the molar volume of 22.4 L/mol as a conversion factor if the reaction is run at STP.
3. a)1.14 moles on CaCl2; b) 17.86 g of AgCl; c) 0.0105 moles of CaCl2 and 0.021 moles of AgNO3 should be used.
4. a)9.41 g of C; b) 101.48 g of SiC; c) 27.12 g of C.
5. a) 2,76 liters of O2; b) 182,25 liters of C4H10; c) 31 liters of H2O and 24,8 liters of CO2 are produced.
6. a) 2,15 liters of CO2; b) 218,67 g of HCl; c) 40,6 g of CaCO3 would be consumed; 9,09 liters of CO2 would be produced.
7. a)0,058 g of N2; b) 604,8 liters of CO2; c) The total volume is 7,15 liters.
8. a) 3,47*10^23 atoms of Fe; b) 234 liters of O2; c) 0,458 moles of Fe2O3.
9. 83 %