lOMoAR cPSD| 6861666
CHEM 280 Mock Exam VI - Comprehensive Practice Exam
Questions and Answers with Complete Solution | New 2026 |
Graded A+
Mock Exam 6
1) Which of following statements are consistent with the Kinetic Molecular Theory?
A) Gases are compressible because the volume taken up by the gas is almost entirely open space.
B) Gases assume the shape and volume of their container because they are in constant, straight-line motion.
C) Gases have a low density because there is so much empty space between the particles.
D) Gas particles collide with each other and surfaces without losing any energy.
E) All of the above statements are consistent with the Kinetic Molecular Theory.
2) What is the equivalent pressure of 0.905 atm in units of mm Hg?
A) 688
B) 840
C) 0.905
D) 13.3
E) none of the above
3) A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces a pressure of
. What is the volume of the balloon at this depth?
A) 1.63 L
B) 0.154 L
C) 6.50 L
D) 0.615 L
E) none of the above
4) If the volume of a gas container at 32.0°C changes from 1.55 L to 755 mL, what will the final temperature be?
A) 149°C
B) 353°C
C) 273°C
D) -124°C
E) none of the above
5) What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature
was determined to be 255.0°C?
A) 480°C
B) -41°C
C) 232°C
D) 207°C
E) none of the above
, lOMoAR cPSD| 6861666
6) What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature
was determined to be 255.0°C?
A) 480°C
B) -41°C
C) 232°C
D) 207°C
E) none of the above
7) A sample of 0.255 mole of gas has a volume of 748 mL at 28°C. Calculate the pressure of this gas. (R= 0.0821 L ∙
atm / mol ∙ K)
A) 8.42 atm
B) 0.784 atm
C) 0.00842 atm
D) 7.84 × 10-4 atm
E) none of the above
8) What is the temperature (°C) of 2.48 moles of gas stored in a container at
?
(R= 0.0821 L atm/ mol K)
A) 302
B) 189
C) 29
D) -84
E) none of the above
9) A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C. What is the noble gas?
(R= 0.0821 L atm/ mol K)
A) He
B) Ne
C) Ar
D) Kr
E) not enough information
10) A gas cylinder contains only the gases radon, nitrogen, and helium. The radon has a pressure of 222 torr while
the nitrogen has a pressure of 446 torr. If the total pressure inside the cylinder is 771 torr, what is the pressure that
is due to the helium?
A) 771 torr
B) 668 torr
C) 549 torr
D) 103 torr
E) none of the above
CHEM 280 Mock Exam VI - Comprehensive Practice Exam
Questions and Answers with Complete Solution | New 2026 |
Graded A+
Mock Exam 6
1) Which of following statements are consistent with the Kinetic Molecular Theory?
A) Gases are compressible because the volume taken up by the gas is almost entirely open space.
B) Gases assume the shape and volume of their container because they are in constant, straight-line motion.
C) Gases have a low density because there is so much empty space between the particles.
D) Gas particles collide with each other and surfaces without losing any energy.
E) All of the above statements are consistent with the Kinetic Molecular Theory.
2) What is the equivalent pressure of 0.905 atm in units of mm Hg?
A) 688
B) 840
C) 0.905
D) 13.3
E) none of the above
3) A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces a pressure of
. What is the volume of the balloon at this depth?
A) 1.63 L
B) 0.154 L
C) 6.50 L
D) 0.615 L
E) none of the above
4) If the volume of a gas container at 32.0°C changes from 1.55 L to 755 mL, what will the final temperature be?
A) 149°C
B) 353°C
C) 273°C
D) -124°C
E) none of the above
5) What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature
was determined to be 255.0°C?
A) 480°C
B) -41°C
C) 232°C
D) 207°C
E) none of the above
, lOMoAR cPSD| 6861666
6) What is the initial temperature of a gas if the volume changed from 1.00 L to 1.10 L and the final temperature
was determined to be 255.0°C?
A) 480°C
B) -41°C
C) 232°C
D) 207°C
E) none of the above
7) A sample of 0.255 mole of gas has a volume of 748 mL at 28°C. Calculate the pressure of this gas. (R= 0.0821 L ∙
atm / mol ∙ K)
A) 8.42 atm
B) 0.784 atm
C) 0.00842 atm
D) 7.84 × 10-4 atm
E) none of the above
8) What is the temperature (°C) of 2.48 moles of gas stored in a container at
?
(R= 0.0821 L atm/ mol K)
A) 302
B) 189
C) 29
D) -84
E) none of the above
9) A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C. What is the noble gas?
(R= 0.0821 L atm/ mol K)
A) He
B) Ne
C) Ar
D) Kr
E) not enough information
10) A gas cylinder contains only the gases radon, nitrogen, and helium. The radon has a pressure of 222 torr while
the nitrogen has a pressure of 446 torr. If the total pressure inside the cylinder is 771 torr, what is the pressure that
is due to the helium?
A) 771 torr
B) 668 torr
C) 549 torr
D) 103 torr
E) none of the above
