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What is the molar mass of the unknown gas

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Reference no: EM132412920

It takes 17.5 minutes for a 10.0 mL sample of an unknown gas to effuse through a pinhole. A 10.0 mL sample of helium, He, required 4.85 minutes. What is the molar mass of the unknown gas?

Give your answer in grams per mole (g mol-1), accurate to three significant figures. Do not include units as part of your answer.

Reference no: EM132412920

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