Question

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

Answer 1

D. 5 moles

Step-by-step explanation:

C3H8 + 5O2 → 4H2O + 3CO2

5 mol 3 mol

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