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

Multiple Choice

Pure copper may be produced by the reaction of copper(I) sulfide with oxygen gas as follows:
Cu₂S(s) + O₂(g) $\to$ 2Cu(s) + SO₂(g)
What mass of copper(I) sulfide is required in order to prepare 0.610 kg of copper metal?

A) 0.610 kg
B) 0.305 kg
C) 0.459 kg
D) 1.53 kg
E) 0.764 kg