In the Process of Obtaining Lead from PbS, or Galena

Multiple Choice

In the process of obtaining lead from PbS, or galena, the galena is "roasted" (heated in the presence of oxygen) , so that the following reaction occurs: 2PbS(s) + 3O₂(g) → 2PbO(s) + 2SO₂(g) If 35.2 g of PbS is mixed with 15.5 g of oxygen, how many grams of PbO should form?

A) 32.8 g
B) 72.1 g
C) 105 g
D) 65.7 g
E) 49.2 g