已知标准大气压下空气的密度为11.923g\L,氧气的密度为1.429g\L,根据空气中氧气的体积分数计算质量分数
人气:411 ℃ 时间:2019-08-20 09:07:18
解答
设空气体积是1 L,则空气质量 = 1.293g
空气中氧气体积 21%,则氧气体积为 1L×21%
氧气质量为 1L×21%×1.429 g/L = 0.3 g
氧气质量分数 = 0.3 g ÷ 1.293g = 23.2%
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