The combustion reaction of propane is described by the reaction.

Question

C3H8 + 5O2 → 4H2O + 3CO2.
How many moles of O2 are required to generate 3 moles of CO2?

2.5 moles

3 moles

4 moles

5 moles

Answer 1

3 mols CO2 x (5 mols O2/3 mols CO2) = 3 x (5/3) = ?

Answer 2

3 moles

Answer 3

3 moles