Combined Gas Law Practice

Hydrogen gas was cooled from 150^oC to 50^oC. Its new volume is 75 mL. What was its original volume?

• 98 mL

• 98 K

• 98^oC

• 98 L

A rigid plastic container holds 1.00 L methane gas at 0.9 atm pressure when the temperature is 22.0°C. How much more pressure will the gas exert if the temperature is raised to 44.6°C?

• 0.97 atm

• 1.82 atm

• 0.97^oC

• 1.82^oC

If a gas sample has a pressure of 30.7 kPa at 0.00°C, by how much does the temperature have to decrease to lower the pressure to 28.4 kPa?

• 33.89 ^oC

• -20.46 ^oC

• 597 ^oC

• -4.25 ^oC

Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.

• 7.18 L 

• 7.81 L

• 4.63 L

• 4.36 L

Determine the Kelvin temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under .998 atm pressure. 

• 0 K 

• 107 K 

• 207 K 

• 307 K 

How many moles of propane gas are in a 7.0 L tank at 20°C and 5.45atm of pressure?

• 0.629 mol

• 1.59 mol

• 23.2 mol

• 917 mol

A weather balloon has a volume of 105L at 0.97 atm when the temperature is 318K. What is the volume at 293K and 1.05 atm?

• 89.4 L

• 0.32 L

• 93.8 L

• 3.13 L

A balloon contains 3.5 L of He gas at 27 ^oC and 760 mmHg.  At what temperature in Celsius will its volume be 3.0 L at 830 mmHg?

• 8 ^oC

• 281 ^oC

• 123 ^oC

• 10^oC

A 1.11 L sample of neon gas at 18 C and  0.799 atm is heated to 49 C. The new gas pressure is 1.11 atm. What is the change in volume of the neon gas? Remember temp must be in K!

• .30L

• .884L

• .28L

• 1.2L

I’ve got a car with an internal volume of 12,000 L. If I drive my car into the river and it implodes, what will be the volume of the gas when the pressure goes from 1.0 atm to 1.4 atm?

• 8571.43 L

• 3210.26 L

• 8669.0 atm

• 3905.33 atm