Chemistry

Steven analyzed a compound and found it to be 52.7% Potassium and 47.3% Chlorine. He determined the empirical formula to be

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  1. Assume 1000 grams.
    Moles K: 527/39=13.5
    Moles Cl: 147/35=13.5

    divide by lowest number to get ratio:
    Moles K: 1.0
    Moles Cl: 1.0
    empirical formula= KCl

  2. Px Cly
    total mass of a mol = 31 x + 35.5 y
    fraction that is P = 31 x /(31x + 35.5y) = .527
    fraction that is Cl = 35.5 y /(31x + 35.5y) = .473
    =========================================
    31 x = 16.337 x + 18.709 y ----> 14.663 x =18.709 y
    35.5 y = 14.663x + 16.792 y---->14.663 x = 18.709y check
    so y = 1.275 x
    1275/1000 = 255/200 = 51/40 well about 5/4 maybe
    P4Cl5

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