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A mixture of methane and helium is placed in a 2.0 l flask at 27 degrees the partial pressure of methane is 0.72 ATM and the partial pressure of helium is 0.22 ATM . What is the mole fraction of ch4?


    mole fractions are proportional to temp:

    find total moles:
    n=PV/RT where P=.94ATM


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