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18 June, 05:43

The partial pressures of CH 4, N 2, and O 2 in a sample of gas were found to be 183 mmHg, 443 mmHg, and 693 mmHg, respectively. What is the mole fraction of nitrogen?

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Answers (2)
  1. 18 June, 05:46
    0
    Mole fraction N₂ = 0.336

    Explanation:

    Mole fraction of a gas can be determined in order to know the partial pressure of the gas, and the total pressure, in the mixture.

    Total pressure in the mixture: Sum of partial pressure from all the gases

    Total pressure = 183 mmHg + 443 mmHg + 693 mmHg = 1319 mmHg

    Mole fraction N₂ = Partial pressure N₂ / Total pressure

    443 mmHg / 1319 mmHg = 0.336

    Remember that mole fraction does not carry units
  2. 18 June, 06:04
    0
    The mol fraction of N2 is 0.336

    Explanation:

    Step 1: Data given

    Partial pressure CH4 = 183 mm Hg

    Partial pressure N2 = 443 mm Hg

    Partial pressure O2 = 693 mm Hg

    Step 2: Calculate total pressure

    Total pressure = partial pressure CH4 + partial pressure N2 + partial pressure O2

    Total pressure = 183 mm Hg + 443 mm Hg + 693 mm Hg

    Total pressure = 1319 mm Hg

    Step 3: Calculate mol fraction

    Mol fraction = partial pressure / total pressure

    Mol fraction N2 = 443 mm Hg / 1319 mm Hg

    Mol fraction N2 = 0.336

    The mol fraction of N2 is 0.336
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