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15 February, 22:41

The rate of effusion of oxygen to an unknown gas is 0.935. what is the other gas?

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  1. 16 February, 01:39
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    N2

    Explanation:

    Rate of effusion is defined by Graham's Law:

    (Rate 1/Rate 2) = (sqrt (M2) / sqrt (M1))

    (Where M is the molar mass of each substance.)

    Molar Mass of oxygen, O2, is 32 (M1).

    Rate of effusion of O2 to an unknown gas is. 935 (Rate 1).

    Rate 2 is unknown so put 1.

    Solve for x (M2).

    .935/1 = sqrt x / sqrt32

    .935 x sqrt 32 = sqrt x

    5.29 = sq rt x

    5.29^2 = 27.975 = 28

    N2 has a molar mass of 28 so it is the correct gas.
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