Chemistry - Gas Stoichiometry

Question

Gas A has a molar mass 24.9 while gas B has a molar mass 94.6. Which gas will effuse slower? A or B?

Answer 1

Read up on Graham's law of effusion.

The lighter the gas (lower molar mass), the faster it will effuse. Or, vice versa, the heavier (higher molar mass), the slower it will effuse.

Thus, gas B with a greater molar mass will effuse slower than gas A