题目

How many _________ are there in the room? A. woman   B. women     C.child     D.woman’s 答案:B某氨水中c()=0.5 mol / L时达到电离平衡,若向其中加入c()=0.5 mol / L的NH4Cl溶液后,NH3·H2O的电离程度将                                                                (    ) A.减少                      B.不变               C.增大              D.无法判断
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