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A sample of hydrogen gas (H2) was found to effuse at a rate equal to 6.7 times that of an unknown gas. The molecular weight of the unknown gas is __________ g/mol. Express your answer to one (tenth) decimal place.

  • Chemistry -

    I would make up a rate for the unknown gas and multiply that made up rate x 6.7 to find the rate of H2. Plug in those numbers.
    rate1/rate2 = sqrt(M2/M1)
    Solve for M (depending upon what you call rate 1 and rate2, M2 and M1.

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