When Copper Reacts with Sulfur at High Temperature, Copper(I) Sulfide $\rightarrow$

Multiple Choice

When copper reacts with sulfur at high temperature, copper(I) sulfide is formed. 2Cu(s) + S(s) $\rightarrow$ Cu₂S(s) If the mass of the Cu₂S formed is 1.17 g, what mass of copper should have reacted?

A) 0.934 g
B) not enough information
C) 0.78 g
D) 2.34 g
E) 0.467 g