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29 December, 11:14

An unknown gas effuses 1.66 times more rapidly than CO2. What is the molar mass of the unknown gas, given that the molar mass of CO2 is 44 grams?

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  1. 29 December, 11:23
    0
    To determine the molar mass of the unknown gas, we use Graham's Law of effusion which relates the rate of the gases with their respective molar masses. We calculate as follows:

    r1 / r2 = √ (M2 / M1)

    We let 1 represent the unknown gas and 2 the carbon dioxide.

    r1 / r2 = 1.66 = √ (44.01 / M1)

    M1 = 15.97 g/mol
  2. 29 December, 11:29
    0
    The molar mass is 16.0 grams
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