What mass of copper oxide (||) can react with 5.6 liters of hydrogen.

1. Let’s write down the reaction equation:

CuO + H2O = Cu + H2O;

2.Calculate the chemical amount of hydrogen:

n (H2) = V (H2): Vm = 5.6: 22.4 = 0.25 mol;

3.Calculate the amount and mass of copper oxide:

n (CuO) = n (H2) = 0.25 mol;

m (CuO) = n (CuO) * M (CuO);

M (CuO) = 64 + 16 = 80 g / mol;

m (CuO) = 0.25 * 80 = 20 g.

Answer: 20 g.