47 The products of combustion are thus: N 2 17.87 volumes CO 0.5 CO 2 2.5 H 2 O 4.0 Total24.87 Giving the percentage compositions: Wet(%)Dry(%) N 2 71.985.6 CO 2.0 2.4 CO 2 10.012.0 H 2 O16.1 -