Chemistry

Use the chemical reaction below to answer
the questions that follow.
CuO(s) + H2(g) → Cu(s) + H2O(g)
a. What is the limiting reactant when 19.9 g
CuO react with 2.02 g H2?
b. The actual yield of copper was 15.0 g.
What is the percentage yield?
c. How many grams of Cu can be collected
if 20.6 g CuO react with an excess of
hydrogen with a yield of 91.0%?

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