Select the correct answer.
The combustion reaction of propane is described by the reaction.

C3H8 + 5O2 → 4H2O + 3CO2.

How many moles of O2 are required to generate 3 moles of CO2?

A.
2.5 moles

B.
3 moles

C.
4 moles

D.
5 moles

D. 5 moles

Explanation:

C3H8 + 5O2 → 4H2O + 3CO2

            5 mol                 3 mol

So, to make 3 mol CO2    5 mol O2 are needed.

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