June 2013 Chemistry Regents #60-62

Highlight to reveal answers and explanations

 

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Question 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77  Questions 78-80  Questions 81-82  Questions 83-85

 

Other Regents Exams

 

  Base your answers to questions 60 through 62  on the information below.

Cylinder A has a movable piston and contains hydrogen gas. An identical cylinder, B, contains methane gas. The diagram below represents these cylinders and the conditions of pressure, volume, and temperature of the gas in each cylinder.

60 Compare the total number of gas molecules in cylinder A to the total number of gas molecules in cylinder B. [1]

Highlight box to reveal answer

The number of gas molecules in cylinder A is the same as the number of gas molecules in cylinder 13.

61 State a change in temperature and a change in pressure that will cause the gas in cylinder A to behave more like an ideal gas. [1]

Highlight box to reveal answer

Temperate: higher  Pressure: lower

Temperature: above 293 K   Pressure: below 1.2 atm

62 In the space in your answer booklet, show a numerical setup for calculating the volume of the gas in cylinder B at STP. [1]

Highlight box to reveal answer

(1.2atm)(1.25L)/293K=(1.0 atm)(V2)/273K

or  (273)(1.2)(1.25)/293

on to Questions 63-65

 

 

 

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Question 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77  Questions 78-80  Questions 81-82  Questions 83-85

 

Back to Regents Exams