Answer:
50 moles of oxygen
Step-by-step explanation:
The reaction between octane (C8H18) and oxygen (O2) can be represented by the following equation:
C8H18 + 12.5O2 -> 8CO2 + 9H2O
So, to react fully with 4 mol of octane, we need 4 mol * 12.5 mol O2/1 mol C8H18 = 50 moles of oxygen.
ALLEN