Chapter 7

Question 1

What is the relationship between pressure and volume of a gas at constant temperature?
A. as volume increases, pressure stays stable
B. as volume decreases, pressure increases
C. as volume decreases, pressure decreases
D. as volume increases, pressure increases

Answer 1

as volume decreases, pressure increases

Question 2

1 atm = ? mmHg

Answer 2

760 mmHg

Question 3

At STP, one mole of an ideal gas occupies a volume of

Answer 3

22.414 liters

Question 4

What does STP stand for?

Answer 4

Standard Temperature and Pressure

Question 5

A sample of nitrogen gas occupies 8.60 L at 21 °C and 0.798 atm. If the pressure is increased,
to 1.27 atm at a constant temperature, what is the newly occupied volume?

A. 13.7 L
B. 5.4 L
C. 6.7 L
D. 8.60 L

Answer 5

B. 5.4 L

Question 6

What is Boyle’s Law formula?

Answer 6

P1V1 = P2V2

Question 7

0°C = ? Kelvin

Answer 7

273.15 K

Question 8

1 atm = ? Pa

Answer 8

101,326 Pascal (Pa)

Question 9

PV = nRT
P = ?

Answer 9

Pressure

Question 10

PV = nRT
V = ?

Answer 10

Volume

Question 11

PV = nRT
n = ?

Answer 11

Number of moles

Question 12

PV = nRT
R = Ideal Gas Constant

A. 0.0821
B. 0.9097
C. 1.564
D. 22.414

Answer 12

A. 0.0821

Question 13

PV = nRT
T = ?

Answer 13

Temperature

Question 14

At STP the conditions are 273.15 K and __ atm

Answer 14

1

Question 15

PV = nRT

The equation to find the pressure (P) is…

Answer 15

P = nRT/V

Question 16

PV = nRT

The equation to find the volume (V) is…

Answer 16

V = nRT/P

Question 17

PV = nRT

The equation to find the number of moles of gas (n) is…

Answer 17

n = PV/RT

Question 18

PV = nRT

The equation to find the temperature (T) is…

Answer 18

PV/nR

Question 19

60.25 L of an unknown gas has a mass of 75.3 g at STP. What is the identity of the unknown
gas?

A. Cl2
B. CO2
C. O2
D. N2

Answer 19

D. N2

Question 20

A container filled with helium and argon gas is 16.00% by volume argon. What is the partial
pressure of argon if the total pressure inside the container is 6.88 atm?

Answer 20

1.1 atm

Question 21

Oxygen gas (PO2 = 0.890 atm), nitrogen gas (PN2 = 1.340 atm), and carbon dioxide gas (PCO2 = 0.421 atm) occupy the same container. What is the total pressure in the container?

Answer 21

2.651 atm

Question 22

What mass of fluorine is needed to fill an 724 L tank at STP?

Answer 22

1.23 kg

Question 23

The pressure of a gas in a container is 1.23 atm and occupies a volume of 1.5 L. If the
original volume is doubled at constant temperature, what would happen to the pressure?

Answer 23

The pressure would decrease by half

Question 24

A sample of nitrogen gas occupies 8.60 L at 21 °C and 0.798 atm. The pressure is increased
to 1.27 atm at constant temperature.

What is P1?

Answer 24

0.798 atm

Question 25

A sample of nitrogen gas occupies 8.60 L at 21 °C and 0.798 atm. The pressure is increased
to 1.27 atm at constant temperature.

What is V1?

Answer 25

8.60 L

Question 26

A sample of nitrogen gas occupies 8.60 L at 21 °C and 0.798 atm. The pressure is increased
to 1.27 atm at a constant temperature.

What is P2?

Answer 26

1.27 atm

Question 27

A sample of nitrogen gas occupies 8.60 L at 21 °C and 0.798 atm. If the pressure is increased
to 1.27 atm at constant temperature, what is the newly occupied volume?

Answer 27

5.4 L

Question 28

A _____ is a general instrument that utilizes a liquid column, typically mercury, to measure
pressure.

Answer 28

Manometer