The combustion of propane (C_3H_8) in the presence of excess oxygen yields CO_2and H_2O: C_3H_8 (g) + 5O_2 (g) rightarrow 3CO_2 (g) + 4H_2O (g) When 2.5 mol of O_2 are consumed in their reaction, ________ mol of CO_2 are produced. A) 1.5 B) 3.0 C) 5.0 D) 6.0 E) 2.5