Chemistry

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A gas mixture with a total pressure of 750 mmHg contains each of the following gases at the indicated partial pressures: , 265 mmHg; Ar 134 mmHg; and ,O2 157 mmHg; The mixture also contains helium gas.

  • Chemistry -

    You have two problems. The first is you didn't identify the gas with 265 mm Hg pressure. The second is you didn't ask a question. I will assume the 265 mm Hg gas is just X and I will assume the question is, "What is the pressure of He."
    Ptotal = PX + PAr + PO2 + PHe.
    Substitute and solve for PHe.

  • Chemistry -

    189 he?

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