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Zn metal was allowed to react with hydrochloric acid to produce hyrdogen gas.This gave a total of 555mL of gas collected over water at 20C and a pressure of 747mm of Hg. How many moles of hydrogen were collected? The vapor pressure of water at 20C is 18mm Hg.

  • Chemistry -

    PV = nRT
    P = (747-18/760) = ?atm
    V = 555 mL = 0.555L
    R = you know it
    T = 20C = 273K
    Solve for n.

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