Calculate the mass of hydrogen that reacts with copper oxide (ll) to form 32 g of copper.

univerkov | February 24, 2021 | education

1. We make a chemical equation (in this case, you do not need to set the coefficients):

CuO + H2 = H2O + Cu.

2. Find the amount of substance Cu and H2:

n (Cu) = m \ M = 32 \ 64 = 0.5 mol.

n (H2) = n (Cu) = 0.5 mol.

3. Find the mass of hydrogen:

m (H2) = n * M = 0.5 mol * 2 = 1 liter.

Answer: m (H2) = 1l.

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