Unit 9 Final Review (Gas Laws)

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

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

What  volume does 6.02 X 10²³ molecules of N₂ have at STP?  

• 44.8 L
• 22.4 L
• 11.2 L
• 67.2 L

In order to convert to Kelvin, you add ______ to the Celsius measurement.

• 372
• 273
• 237
• 732

The following graph shows ____ relationship. 

• Direct
• Inverse

Boyle's law :  The pressure and volume of a gas show a _____ relationship. 

• Inverse 
• Direct 

Determine the number of moles in a container of gas at STP with a volume of 99.2 L. 

• 2222.08 moles
• 4.43 moles
• 22.4 moles 
• 76.8 moles

A sample of gas with a volume of 30.0 mL at 25.0^oC is heated to 50.0^oC.  What is the new volume of the gas?

• 60.0 mL
• 15.0 mL
• 27.5 mL
• 32.5 mL

A sample of oxygen at 28.0°C has 340.0 kPa. What will its temperature be at 150.0 kPa?

• 132.8 K
• 132.8 °C
• 682.2 K
• 12.35 K

f a gas at 25.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its volume at a pressure of 2.50 atm?

• 9 L
• .69 L
• 1.44 L