试题与答案

下列叙述不正确的是 A.与28 gCO具有相同分子数的C2H4的质量一定是28

题型:选择题

题目:

下列叙述不正确的是

A.与28 gCO具有相同分子数的C2H4的质量一定是28 g

B.1 molAl3含有的核外电子数为3NA

C.常温常压下,1 molL甲烷含有的原子数为5NA

D.1 L 1 mol·L-1醋酸溶液中CH3COO的数目小于NA

答案:

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题型:阅读理解

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题型:材料分析题

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