Question

250cm^3 sample of H2 gas effuses four times rapidly of an unknown gas calculate molar mass of an unknown gas​

Answer 1

EXPLANATION:

Effusion rate of a gas is inversely proportional to the square root of the molecular wt. of the gas.

Rate H2 over Rate Unknown gas = Molec wt.

unknown over molec wt. H2 4 over 1 = square root molecular wt X over square root molecular wt. H2 which is 2 4 over 1 = sq root X over 1.41 5.66 = square root of X 5.66 squared = 32 as molecular wt of gas X.

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