Barrons SAT Subject Test Chemistry, 13th Edition

(Marvins-Underground-K-12) #1

  1. (A) The balanced equation shows that 1 mole of zinc requires 2 moles of
    hydrochloric acid to completely react. The masses provided show only
    1.0 mole of hydrochloric acid (36.5 g) is present to react with the 1.0 mole of
    zinc (65 g), indicating that the hydrogen chloride is the limiting reactant.
    Because the balanced equation also shows that 1 mole of hydrogen is
    produced for every 2 moles of hydrogen chloride reacted, the number of moles
    of hydrogen gas that can be produced is 0.50.

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