Which gas diffuses at a faster rate: oxygen or nitrogen and why?

Dear student. Rate of diffusion is inversely proportional to the square root of molar mass. From above options, nitrogen has lowest molar mass (14) than oxygen (32), hence it will have highest diffusion rate. Therefore nitrogen will diffuse faster. Hope it is clear . Regards

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nitrogen because it has low relative molecular mass than oxygen.
nitrogen (28)
oxygen (32)
so because of low molecular mass it is lighter and diffuses faster.
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