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Homework Help: Mass Percent Equation

  1. Feb 28, 2010 #1
    Brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows:

    Zn (s) + 2 HCl (aq) → ZnCl2 (aq) + H2 (g)

    Cu does not react with HCl. When 0.5065 g of a certain brass alloy is
    reacted with excess HCl, 0.0985 g of ZnCl2 is eventually isolated.

    What is the composition of the brass by mass? (i.e., m%Cu, m%Zn)
  2. jcsd
  3. Mar 3, 2010 #2
    Gnerally, your required to make some kind of attempt if possible.
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