August 2015 Chemistry Regents #16-20

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Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-74  Questions 75-76  Questions 77-78  Questions 79-80  Questions 81-82  Questions 83-85

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16 The temperature of a sample of matter is a measure of the

(1) average potential energy of the particles of the sample

(2) average kinetic energy of the particles of the sample

(3) total nuclear energy of the sample

(4) total thermal energy of the sample

2 link temperature=average kinetic energy
17 Under which conditions of temperature and pressure does a real gas behave most like an ideal gas?

(1) 37 K and 1 atm      (3) 347 K and 1 atm

(2) 37 K and 8 atm      (4) 347 K and 8 atm

3 link ideal conditions are ideal vacation conditions

high temp low pressure

18 The ratio of chromium to iron to carbon varies among the different types of stainless steel. Therefore, stainless steel is classified as

(1) a compound     (3) a mixture

(2) an element        (4) a substance

3 link mixture= variable composition

 

19 Which statement explains why increasing the temperature increases the rate of a chemical reaction, while other conditions remain the same? (1) The reacting particles have less energy and collide less frequently. (2) The reacting particles have less energy and collide more frequently. (3) The reacting particles have more energy and collide less frequently. (4) The reacting particles have more energy and collide more frequently 4 link  particles have more energy and collide more frequently
20 An open flask is half filled with water at 25C. Phase equilibrium can be reached after

(1) more water is added to the flask

(2) the flask is stoppered

(3) the temperature is decreased to 15C

(4) the temperature is increased to 35C

2 link equilibrium needs a closed system

 

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

Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-74  Questions 75-76  Questions 77-78  Questions 79-80  Questions 81-82  Questions 83-85

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