Question 1

A gas has a volume of 45.0 L and a pressure of 540.mmHg when the temperature is 27 °C.What is the volume when the pressure changes to 800.mmHg with a temperature of -65 °C,if there is no change in the amount of gas?

Accepted Answer

The answer of A gas has a volume of 45.0...

Question 2

What temperature scale is used in gas law calculations?

Accepted Answer

A) Fahrenheit 
B) Celsius 
C) Kelvin 
D) either Celsius or Fahrenheit 
E) either Celsius or Kelvin

Question 3

Which of the following is not a potential use for a hyperbaric chamber?

Accepted Answer

A) treatment for burns and infections 
B) counteracting carbon monoxide poisoning 
C) increasing the rate at which a broken bone heals 
D) treating a diver with the bends 
E) treating some cancers

Question 4

The gas with an initial volume of 24.0 L at a pressure of 565 torr is compressed until the volume is 16.0 L.What is the final pressure of the gas,assuming the temperature and amount of gas does not change?

Accepted Answer

A) 377 torr 
B) 760 torr 
C) 848 torr 
D) 500.torr 
E) 465 torr

Question 5

A gas at 5.00 atm pressure was stored in a tank during the winter at 5.0 °C.During the summer,the temperature in the storage area reached 40.0 °C.What was the pressure in the gas tank in the summer,if the volume and amount of gas do not change?

Accepted Answer

A) 0.625 atm 
B) 4.44 atm 
C) 5.63 atm 
D) 40.0 atm 
E) 69.5 atm

Question 6

A gas has a volume of 36.0 L and a pressure of 750.torr when the temperature is 10.°C.What is the pressure if the volume changes to 15.0 L and the temperature changes to 78 °C,if the amount of gas stays the same?

Accepted Answer

The answer of A gas has a volume of 36.0...

Question 7

The kinetic energy of a gas sample is directly proportional to the Kelvin temperature of the gas.

Accepted Answer

A) True 
 B)False

Question 8

At STP,how many moles of helium would occupy 1.00 L?

Accepted Answer

A) 2.24 moles 
B) 224 moles 
C) 22.4 moles 
D) 0.446 moles 
E) 0.0446 moles

Question 9

A tank contains helium gas at 490 mmHg,nitrogen gas at 0.75 atm,and neon at 520 torr.What is the total pressure in atm?

Accepted Answer

A) 2.1 atm 
B) 0.55 atm 
C) 1.0 × 103 atm 
D) 1.5 atm 
E) 1600 atm

Question 10

One atmosphere is the same pressure as ________ mmHg.

Accepted Answer

The answer of One atmosphere is the same pressure as...

Question 11

The temperature of a 500.mL sample of gas increases from 150.K to 350.K.What is the final volume of the sample of gas,if the pressure and amount of gas in the container is kept constant?

Accepted Answer

A) 210 mL 
B) 1170 mL 
C) 0.00950 mL 
D) 0.00474 mL 
E) 110 mL

Question 12

A cyclopropane-oxygen mixture is used as an anesthetic.If the partial pressure of cyclopropane in the mixture is 330 mmHg and the partial pressure of the oxygen is 1.0 atm,what is the total pressure of the mixture in torr?

Accepted Answer

A) 330 torr 
B) 430 torr 
C) 760 torr 
D) 1.4 torr 
E) 1100 torr

Question 13

At STP conditions,11 g of SO2  have a volume of ________.

Accepted Answer

A) 250 L 
B) 3.8 L 
C) 22 L 
D) 0.0076 L 
E) 130 L

Question 14

A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 °C.What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is 27 °C,if the amount of gas does not change?

Accepted Answer

A) 580 mL 
B) 630 mL 
C) 100 mL 
D) 110 mL 
E) 1100 mL

Question 15

The unit of 1 atmosphere used to describe the pressure of a gas is equal to ________.

Accepted Answer

A) 1 mmHg 
B) 100 mmHg 
C) 200 mmHg 
D) 600 mmHg 
E) 760 mmHg

Question 16

1 mole of a gas occupies 22.4 L at ________.

Accepted Answer

A) 0 °C and 0.50 atm 
B) 0 °C and 760 mmHg 
C) 100 °C and 1 atm 
D) 100 °C and 10 atm 
E) 0 K and 1 atm

Exam 8: Gases