Unit 9 Exam

Question 1

A gas that exerts a pressure of 215 torr in a container with a volume of 51.0 mL will exert a pressure of ___ torr when transferred to a container with a volume of 18.5 mL.

Answer 1

.593

Question 2

A gas that exerts a pressure of 14 bar in a container with a volume of 312 mL will exert a pressure of ____ bar when transferred to a container with a volume of 652 mL.

Answer 2

6.7

Question 3

When the volume of a gas is changed from 986 mL to ____ mL, the temperature will change from 765 K to 315 K.

Answer 3

406

Question 4

When the volume of a gas is changed from 3.6 L to 15.5 L, the temperature will change from ___ degrees Celsius to 87°C.

Answer 4

-190.15

Question 5

When the pressure that a gas exerts on a sealed container changes from ___ atm to 2.64 atm, the temperature changes from 315 K to 475 K.

Answer 5

1.75

Question 6

When the pressure that a gas exerts on a sealed container changes from 32.6 psi to ___ psi, the temperature changes from 735 K to 1035 K.

Answer 6

45.91

Question 7

A gas is contained in a thick-walled ballon. When the pressure changes from 2.95 atm to ___ atm, the volume changes from 7.456 L to 4.782 L and the temperature changes from 379 K to 212 K.

Answer 7

2.57

Question 8

A gas is contained in a thick-walled ballon. When the pressure changes from 319 mm Hg to 215 mm Hg, the volume changes from 0.558 L to ___ L and the temperature changes from 115 K to 387 K.

Answer 8

2.79

Question 9

How many moles of nitrogen are contained in 18.65 L at STP?

Answer 9

.8321

Question 10

How many moles of fluorine are contained in 115.6 L at STP?

Answer 10

5.16

Question 11

What is the density (in g/L) of a gas with a molar mass of 32.49 g/mol at 2.569 atm and 458 K?

Answer 11

2.22

Question 12

What is the molar mass of 37.96 g of gas exerting a pressure of 3.29 atm on the walls of a 4.6” L container at 3.75 K?

Answer 12

77.2