2 H2 + O2 = 2 H2O
V/3 x
H2燃烧需要氧气的体积x = V/3 ÷ 2 = V/6
2 CO + O2 = 2 CO2
2V/3 y
CO燃烧需要氧气的体积y = 2V/3 ÷ 2 = V/3
共需要O2 体积 =V/6 +V/3 = V/2