What mass of copper is required for the formation of 84 g of copper (II) oxide during its oxidation with oxygen?

univerkov | September 28, 2021 | education

Given:
m (CuO) = 84 g

Find:
m (Cu) -?

1) 2Cu + O2 => 2CuO;
2) n (CuO) = m / M = 84/80 = 1.1 mol;
3) n (Cu) = n (CuO) = 1.1 mol;
4) m (Cu) = n * M = 1.1 * 64 = 70 g.

Answer: The mass of Cu is 70 g.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.