To obtain copper Cu, the reaction CuO + H2 – Cu + H2O is used. How much copper (II) oxide

To obtain copper Cu, the reaction CuO + H2 – Cu + H2O is used. How much copper (II) oxide CuO should be taken to get 128g of copper?

1. We calculate the chemical amount of the obtained copper:

n (Cu) = m (Cu): M (Cu) = 128: 64 = 2 mol;

2.According to the equation of the ongoing reaction, the amounts of copper and its oxide are the same:

n (CuO) = n (Cu) = 2 mol;

3. find the required mass of copper oxide:

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

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

m (CuO) = 2 * 80 = 160 g.

Answer: 160 g.