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题文

等物质的量的N2,O2,CO2混合气体通过Na2O2后,体积变为原体积的8/9(同温同压)这时混合气体中N2,O2,CO2的物质的量之比为(  )

A.3:4:1 B.3:3:2 C.6:7:3 D.6:9:0
科目 化学   题型 选择题   难度 中等
知识点: 探究物质的组成或测量物质的含量
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