试题与答案

用NA代表阿伏加德罗常数。下列说法正确的是( ) A.9 g中所含质子数为0.5

题型:选择题

题目:

用NA代表阿伏加德罗常数。下列说法正确的是( )

A.9 g中所含质子数为0.5×6.02×1023

B.电解精炼铜时,每转移l mol电子,阳极上溶解的金属必为32g

C.往存在V2O5的密闭容器中加入2molSO2和lmolO2,充分反应后分子总数等于2NA

D.V L a mol·L–1的氯化铁溶液中,若Fe3+的数目为NA,则Cl的数目大于3NA

答案:

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