# Calculate the mass of copper oxide (2), which is required to obtain 3 mol of copper by the reaction CuO + H2 = Cu + H2O

August 22, 2021 | education

| To solve, we write down data on the condition of the problem:

X g -? Y = 3 mol.

1. CuO + H2 = Cu + H2O – OBP, copper formed;

2. Calculations by formulas:

M (CuO) = 79.5 g / mol.

M (Cu) = 63.5 g / mol.

Y (Cu) = 3 mol.

Y (CuO) = 3 mol since the amount of substances according to the equation is 1 mol.

3. Find the mass of the original substance:

m (CuO) = Y * M = 3 * 79.5 = 238.5 g.

Answer: the mass of copper oxide is 238.5 g.

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