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> 下列叙述正确的是（　　） A．同温同压下，相同体积的气体，其分子数一定相等，原子数也一定相等 B．任何条件下，等物质的量的甲烷（CH4）和一氧化碳所含的原子数一定相等 C．同温同压下的二氧化碳气体和氮气，若体积相等，则质量一定相等 D．同温同压下，1L一氧化碳气体一定比1L氧气的质量小

问题：

发布时间：2024-09-08

下列叙述正确的是（　　）

A．同温同压下，相同体积的气体，其分子数一定相等，原子数也一定相等

B．任何条件下，等物质的量的甲烷（CH₄）和一氧化碳所含的原子数一定相等

C．同温同压下的二氧化碳气体和氮气，若体积相等，则质量一定相等

D．同温同压下，1L一氧化碳气体一定比1L氧气的质量小

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