Complete combustion of 0.040 mol of an alkane produces 3.60 g of H2O\text{H}_2\text{O}H2O.
What is the molecular formula of the alkane?
C2H6\text{C}_2\text{H}_6C2H6
C3H8\text{C}_3\text{H}_8C3H8
C4H10\text{C}_4\text{H}_{10}C4H10
C5H12\text{C}_5\text{H}_{12}C5H12