PRINCE GEORGE’S COMMUNITY COLLEGE
QUIZ 2C
Multiple Choice Questions
1) Convert 1.25 atm to mm Hg.
A) 760 mm Hg
B) 875 mm Hg
C) 950 mm Hg
D) 1000 mm Hg
E) 1520 mm Hg
Answer: C
2) What volume will a balloon occupy at 1.0 atm, if the balloon has a volume of 7.6 L at 3.8 atm?
A) 2.0 L
B) 5.0 L
C) 29 L
D) 35 L
E) 17 L
Answer: C
3) A sample of 0.300 moles of nitrogen occupies 0.600 L. Under the same conditions, what number of moles occupies 1.200 L?
A) 0.600 moles
B) 1.50 moles
C) 0.33 moles
D) 6.00 moles
Answer: A
4) To what volume will a sample of gas expand if it is heated from
50.0∘C and 2.33 L to 500.0°C?
A) 5.58 L
B) 9.74 L
C) 10.3 L
D) 17.9 L
E) 4.38 L
Answer: A
5) To what temperature must a balloon, initially at 25°C and 2.00 L,
be heated in order to have a volume of 6.00 L?
A) 993 K
B) 403 K
C) 75 K
D) 655 K
E) 894 K
Answer: E
6) A gas is at 35.0°C and 4.50 L. What is the temperature at 9.00 L?
A) 343°C
B) 70.0°C
C) 616°C
D) 1.16°C
E) 17.5°C
Answer: A
7) A large balloon is initially filled to a volume of 25.0 L at 353 K and a pressure of 2575 mm Hg. What volume of gas will the balloon contain at 1.35 atm and 253 K?
A) 22.2 L
B) 87.5 L
C) 11.4 L
D) 45.0 L
E) 58.6 L
Answer: D
8) Calculate the temperature, in K, of 2.20 moles of gas occupying 3.50 L at 3.30 atm.
A) 64.0 K
B) 5.25 K
C) 337 K
D) 28.0 K
Answer: A
9) Give the temperature and pressure at STP.
A) 0°C and 1.00 atm
B) 0K and 1.00 atm
C) 25°C and 30.00 in Hg
D) 300K and 1 torr Hg
E) 0°C and 1 mm Hg
Answer: A
29) Which of the following samples will have the greatest volume at STP?
A) 22 g CO
B) 22 g He
C) 22 g O2
D) 22 g Cl2
E) All of these samples would have the same volume at STP.
Answer: B
32) Using the graph below, determine the gas that has the lowest density at STP.
A) A
B) B
C) C
D) D
E) All of the gases have the same density at STP.
Answer: A
9) Determine the density of CO2 gas at STP.
A) 1.96 g/L
B) 1.80 g/L
C) 2.24 g/L
D) 4.46 g/L
E) 5.10 g/L
Answer: A
66) Identify the gas particle that travels the slowest.
A) H2
B) O2
C) Ne
D) N2
E) CO
Answer: E
10) Which statement is TRUE about kinetic molecular theory?
A) A single particle does not move in a straight line.
B) The size of the particle is large compared to the volume.
C) The collisions of particles with one another is completely elastic.
D) The average kinetic energy of a particle is not proportional to the temperature.
Answer: C
11) Which of the gases in the graph below has the largest molar mass?
A) A
B) B
C) C
D) D
E) There is not enough information to determine.
Answer: D
12) Give the definition for diffusion.
A) gas molecules mix equally
B) gas molecules spread out in a concentration gradient
C) gas molecules escape from a container into a vacuum through a small hole
D) average distance between collisions
E) gas molecules mix unequally
Answer: B
Diff: 1 Page Ref: 5.9
22) What is the density of hydrogen gas at STP?
A) 11.1 g/L
B) 0.0450 g/L
C) 0.0823 g/L
D) 0.0899 g/L
Answer: D
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