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空气中氧气和氢气的比例是多少
更新时间： 2020-09-25 00:00:00  

氧气约占空气的21%，氮气78%，稀有气体0.94%，二氧化碳0.03%，水蒸气和杂质气体0.03%。至于你说的氢气是微乎其微的，包括在水蒸气与杂志气体一项中。

关键词： 空气 氧气 氢气 比例 多少

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