Copper to Copper Sulfide

Question

How many kilograms of copper are needed to make 100.0 kg of copper sulfide?

Cu + S → CuS

Answer 1

Convert 100.0 kg of CuS to moles by dividing by the molar mass of CuS.

Since the stoichiometry of the reaction is 1 mole Cu : 1 mole CuS, that will be the moles of Cu needed. Convert that to kg by multiplying moles Cu by molar mass and change to kg.