Calculate the mass of hydrogen that will react with 80 g of copper oxide (2).

univerkov | February 17, 2021 | education

1. We make a chemical equation (in this case, there is no need to set the coefficients):

CuO + H2 = Cu + H2O.

2. Find the amount of copper oxide substance:

n (CuO) = m / M = 80/80 = 1 mol.

3. The ratio of CuO and H2 is 1: 1, therefore:

CuO = H2.

4. Find the mass of hydrogen:

m (H2) = n * M = 1 mol * 2g / mol = 2g.

Answer: m (H2) = 2g.

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