An unknown gas effuses at 0.850 times the effusion rate of nitrogen dioxide, NO2. Estimate the the molar mass of the unknown gas

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asked May 4, 2018 106k views

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Jotik · Answer 1 · 2018-05-08T03:21:12+0000

Graham's Law,
Rate 1 / Rate 2 = √[M2/M1]
Just substitute, remembering M(NO2) = 46 g/mol,
0.850 = √[46/M1];
Solving, M1 = 63.7 g/mole. The other gas could be SO2, which has molecular weight 63.9 g/mole.

An unknown gas effuses at 0.850 times the effusion rate of nitrogen dioxide, NO2. Estimate the the molar mass of the unknown gas

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