下列敍述正確的是(　　)A．同温同壓下，相同體積的物質，它們的物質的量必相等B．任何條件下，等物質的量的乙烯和...

問題詳情：

下列敍述正確的是(　　)

A．同温同壓下，相同體積的物質，它們的物質的量必相等

B．任何條件下，等物質的量的乙烯和一氧化碳所含的分子數必相等

C．1 L一氧化碳氣體的質量一定比1 L氧氣的質量小

D．等體積、等物質的量濃度的強*中所含的H＋數目一定相等                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

【回答】

B

知識點：物質的量單元測試

題型：選擇題