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7 March, 01:09

Nitrogen:0.781 oxygen:0.209 argon: 0.010 (Mole fraction)

What is the partial pressure or nitrogen (in torr) in the atmosphere when the atmospheric pressure is 765.0 torr?

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  1. 7 March, 03:33
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    The partial pressure of nitrogen is 597.5 torr

    Explanation:

    Step 1: Data given

    Mol fraction of N = 0.781

    Mol fraction of O = 0.209

    Mol fraction Ar = 0.010

    Atmospheric pressure = 765.0 torr

    The partial pressure is given by Pi = Xi * Pt

    ⇒ χ i = the mole fraction of gas i in the mixture

    ⇒ P total = the total pressure of the mixture

    Step 2: Calculate the partial pressure of nitrogen

    P (N) = mol fraction of N * atmospheric pressure

    P (N) = 0.781 * 765.0 torr = 597.5 torr

    The partial pressure of nitrogen is 597.5 torr
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