Pure copper may be produced by the reaction of copper(I) sulfide with oxygen gas as follows: Cu₂S(s) + O₂(g) → 2Cu(s) + SO₂(g)
What mass of copper(I) sulfide is required in order to prepare 0.750 kg of copper metal?

Question

Quizplus · Accepted Answer

The molar mass of Cu2S is 159.16 g/mol, and the molar mass of Cu is 63.55 g/mol. From the balanced equation, 1 mole of Cu2S produces 2 moles of Cu. To produce 0.750 kg (750 g) of Cu, we need 750 g / (2 * 63.55 g/mol) = 5.90 mol of Cu2S. The mass of Cu2S required is 5.90 mol * 159.16 g/mol = 939 g or 0.939 kg.

Pure Copper May Be Produced by the Reaction of Copper(I)sulfide