A gas occupies 2.2L at 425 kPa. Determine its volume at standard pressure. The temperature

does not change.

9.2 L

At room temperature (21°C), the pressure of carbon dioxide in an unopened soda can is 207kPa. Find the pressure of the carbon dioxide in the soda can if left in the trunk of a car on a hot summer day (72°).

242 kPa

• A gas occupies 15.7L at 28°C and 658mmHg. At what temperature will it expand to 20.5L at a pressure of 595mmHg?

355K

• Find the volume occupied by 12.2g of argon gas at 23°C and 115kPa.

6.54L

• At what temperature will 5.0g of chlorine fill a 950mL flask at 125kPa?

202K

• What mass of hydrogen gas was collected in a eudiometer if the volume was 35.2mL, the temperature was 23°C and the pressure of the dry hydrogen was 94.2kPa?

0.00270g

A student blows up a balloon to a volume of 23.1L at 21.4°C. He then places the balloon in an ice water bath, where the temperature is 2.5°C.

Find the new volume of the balloon.

21.6L

• A gas occupies 14.5L at 28°C and 450mmHg. Determine its volume at STP.

7.8L

• A student collects hydrogen over water at 23°C. The pressure in the room is 99.2kPa. The water vapor pressure at 23°C is 2.8kPa. Find the pressure of the dry hydrogen gas.

96.4 kPa

• Which gas below would effuse at the fastest rate:

– A. Hydrogen– B. Argon– C. Helium– D. Carbon monoxide

• A. hydrogen

• A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg.

• Which tank has more molecules?

• They have the same number of molecules!

• A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg.

• Which tank has is heavier?

helium

• A sample of hydrogen and a sample of helium are both in 2.0L tanks at 24°C and 795mmHg.

• Which gas has the higher average kinetic energy?

• They have the same average kinetic energy

• Find the density of nitrogen dioxide at STP.

2.05 g/L

• Find the density of nitrogen dioxide at 25°C and 96kPa.

1.8 g/L

• Find the molar mass of a gas if 12.2g of a gas occupies 2.44L at 94kPa and 24°C.

The gas is a monoatomic element. Identify the gas.

131.3 g/molXe