12) The combustion of propane (C3H8) in the presence of excess oxygen yields CO2 and
H2O:

C3H8 (g) + 5O2 (g)  3CO2 (g) + 4H2O

When 2.5 mol of O2 are consumed in their reaction, __________ mol of CO2 are produced.
A) 1.5
B) 3.0
C) 5.0
D) 6.0
E) 2.5

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