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Chemistry

A mixture of helium and neon gases at 317 K contains 3 times the number of helium atoms as neon atoms. The concentration (𝑛/𝑉) of the mixture is found to be 0.150 mol/L. Assuming ideal behavior, what is the partial pressure of helium?

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  1. Calculate the total pressure of the 1 L as
    PV = nRT
    V = 1 L, n = 0.150, R = 0.08205, T = 317 K
    Ptotal = 3.9 atm
    PHe = XHe x Ptotal where XHe = 3/4 or 0.75
    PHe = 0.75 x 3.9 atm = ?

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