Determine the amount of hydrogen required to recover 16 g of copper (II) oxide. The product yield is considered 100%.


CuO + H2 = t °> Cu + H2O

Calculate the amount of substance of copper oxide:

n (CuO) = m (CuO) / M (CuO) = 16/80 = 0.2 mol,

In the reaction equation, CuO and H2 face the same coefficients. This means that the numbers of moles of these substances are equal:

n (H2) = n (CuO) = 0.2 mol


V (H2) = n (H2) ⋅ Vm = 0.2 ⋅ 22.4 = 4.48 L

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