相对氢气密度为38.34，说明其平均分子量为76.68N2O4 = 2NO2设平衡时N2O4体积为xL，NO2为yL(92x+46y)/(x+y) = 76.6815.32x = 30.68yx:y = 2:1此时N2O4的体积分数为66.7%生成1体积的NO2需要消耗0.5体积N2O4所以N2O4分解百分率为：0.5/(2+0.5) = 20%
