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

User Bonk
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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.
User Jotik
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