Essential Chemistry for IGCSE - Particles And Purification (Section 7 - No. 6)
If two gases at the same temperature are allowed to diffuse, which gas will diffuse faster?
The gas with a higher molecular mass.
The gas with a lower molecular mass.
Both gases will diffuse at the same rate.
Diffusion rate is independent of molecular mass.
Explanation
Lighter gas molecules diffuse faster at the same temperature.
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