The reaction will require 0.373 mol of oxygen.
First, we need to write a balanced equation for this combustion:
This equation assumes complete combustion has occured, meaning that carbon dioxide is one of the products.
Looking at the equation, we see that each one mole of propane
To solve the problem, first convert the mass of propane to moles:
Next, multiply this amount by 5 as given in the proportions set out in the equation: