When 11.2 liters of hydrogen gas is made by adding zinc to sulfuric acid, what mass of zinc is needed? Zn + H2SO4 -> H2 + ZnS

Question

When 11.2 liters of hydrogen gas is made by adding zinc to sulfuric acid, what mass
of zinc is needed?
Zn + H2SO4 -> H2 + ZnSO4

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Sigridomena 8 mins 2021-07-22T20:11:37+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-07-22T20:13:04+00:00

    32.7 g Zn

    Explanation:

    First convert the amount of gas into moles:

    11.2 L H2 × (1 mol H2/22.4 L H2) = 0.500 mol H2

    Then use the molar ratio to find the amount of zinc necessary to produce the amount of gas above:

    0.500 mol H2 × (1 mol Zn/1 mol H2)

    = 0.500 mol Zn

    Now use the molar mass of zinc to find the number of grams of zinc for the reaction to occur:

    0.500 mol Zn × (65.38 g Zn/1 mol Zn)

    = 32.7 g Zn

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