题目

在60 g碳中,所有碳原子的最外层电子数共为__________。 答案:解析:本题思路为:mnN最外层电子数。    n(C)=m(C)/M(C)=60 g/12 g·mol-1=5 mol,    N(C)=n(C)·Na=5 mol×6.02×1023 mol-1=3.01×1024。答案:3.01×1024 The man roared to his ex-wife,“You must keep in mind that I _________ my son every week.” A.have access to         B.look up to C.draw attention to       D.belong to
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