密度和摩尔质量是两码事。密度是单位空间里的分子数量,摩尔是分子质量。氦气密度高,质量低,很难理解吗?
密度和摩尔质量是两码事。密度是单位空间里的分子数量,摩尔是分子质量。氦气密度高,质量低,很难理解吗?
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