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15 May, 22:11

The composition (in mole percent) of the atmosphere is 78.1% N2, 21.0% O2, and 0.9% Ar. What is the partial pressure of each gas when the barometric pressure is 754.1 mm Hg?

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  1. 15 May, 23:33
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    N2 = 588.95 mm Hg

    O2 = 158.36 mm Hg

    Ar = 6.787 mm Hg

    Explanation:

    Their percentage represents their mole fraction.

    N2 = 78.1% = 0.781

    O2 = 21.0% = 0.21

    Ar = 0.9% = 0.009

    Barometric pressure is 754.1 mm Hg

    Partial pressure for each will be,

    For N2 = 0.781 x 754.1 = 588.95 mm Hg

    For O2 = 0.21 x 754.1 = 158.36 mm Hg

    For Ar = 0.009 x 754.1 = 6.787 mm Hg
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