氯元素的相对原子质量为35.5,氯只有35Cl和37Cl两种稳定同位素,在氯

氯元素的相对原子质量为35.5,氯只有35Cl37Cl两种稳定同位素,在氯气中35Cl37Cl的原子个数比为31,则相对分子质量为707274的氯气分子数之比可能是(  )

A53      B522

C52      D931

答案

C

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