4.1-9 Graham's law Quiz

Grahams law refers specifically to

• the rate of diffusion

• the rate of effusion

• the temperature of gases

• the partial and total pressures of gases in a sample.

why would O₂ effuse faster than CO₂ in the same room

• because O₂ has more energy

• because CO₂ has a greater molar mass

• because oxygen has a higher temperature

• they will effuse the same because the temperature is fixed

how many times faster does He effuse compared to N₂ (He = 4  N₂ = 28)

• 1.2 times faster
• 2.65 times faster
• 7 times faster
• 0.377 times faster

The rate of effusion of water vapor is 0.392 and the rate of effusion of propane is 0.250 at the same temperature and pressure.  What is the molar mass of propane? (Assume H₂O = 18g/mol)

• 44.0 g/mol
• 6.63 g/mol
• 0.37 g/mol
• 28.2 g/mol