Dalton's law of Partial Pressure & Ideal Gas Law

What does the variable "n" represent in the ideal gas law?

• pressure

• volume

• moles

• the gas constant

• temperature

What does the variable "R" represent in the ideal gas law?

• pressure

• volume

• moles

• the gas constant

• temperature

What is the total pressure of a mixture of gases where the pressure of gas 1 is 2.0 atm, the pressure of gas 2 is 1.0 atm, and the pressure of gas 3 is 0.5 atm?

• 2.5 atm

• 3.5 atm

• 0.5 atm

• 4 atm

The total pressure of a mixture of oxygen and nitrogen gas is 400.0 kPa. What is the partial pressure of nitrogen if the pressure of oxygen is 150.0 kPa?

• 400.0 kPa

• 550.0 kPa

• 250.0 kPa

• 101.3 kPa

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 sample of hydrogen gas was collected over water at 20.0 ºC. The atmospheric pressure was 105.5 kPa. What is the pressure of the dry hydrogen gas?

• 17.5 mm Hg

• 105.5 KPa

• 107.8 kPa

• 103.2 kPa