试题与答案

阿伏加德罗常数约为6.02×1023mol-1,下列说法中正确的是 A.用石墨电

题型:选择题

题目:

阿伏加德罗常数约为6.02×1023mol1,下列说法中正确的是

A.用石墨电极电解Ca(NO3)2溶液,当转移电子数为0.2NA时,阴极析出4g金属

B.l mol C22H46中含有的C—C键个数约为21×6.02×1023

C.0.1mol 24Mg32S晶体中所含中子总数为28×6.02×1023

D.1 mol Na2O2中所含的阴离子数约为2×6.02×1023

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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