January 2015 Chemistry Regents #16-20

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Question 51-53 Questions 54-55
 Questions 56-58 Questions 59-61 Questions 62-63 Questions 64-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-81 Questions 82-85

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Questions

Answer Links

Explanations

16 Which two gases can not be broken down by chemical means?

(1) CO and He (3) Xe and He

(2) CO and NH3 (4) Xe and NH3

3 link Definition of a Compound
17 Two substances in a mixture differ in density and particle size. These properties can be used to

 (1) separate the substances

(2) chemically combine the substances

(3) determine the freezing point of the mixture

(4) predict the electrical conductivity of the mixture

1 link Property differences are used to separate mixtures
18 Which unit is used to express an amount of thermal energy?

(1) gram (3) joule

(2) mole (4) pascal

3 link Table D has units and their classifications

 

19 Under which conditions of temperature and pressure does a real gas behave most like an ideal gas?

(1) low temperature and low pressure

(2) low temperature and high pressure

(3) high temperature and low pressure

(4) high temperature and high pressure

3 link Ideal conditions are like Ideal vacations

High Temp., Low Pressure

20 According to the kinetic molecular theory for an ideal gas, all gas particles

 (1) are in random, constant, straight-line motion

(2) are separated by very small distances relative to their sizes

(3) have strong intermolecular forces

 (4) have collisions that decrease the total energy of the system

1 link See link for 4 assumptions of an ideal gas

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Question 51-53 Questions 54-55
 Questions 56-58 Questions 59-61 Questions 62-63 Questions 64-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-81 Questions 82-85

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