向100g20%的氯化钠溶液中加入100g水,稀释后溶液中溶质的质量分数是( ) 发布时间:2017-07-28 23:42 │ 来源:www.tikuol.com 题型:选择题 问题: 向100g20%的氯化钠溶液中加入100g水,稀释后溶液中溶质的质量分数是( )A.2.5%B.5%C.10%D.20%
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