向1000克20%的溶液中加入1000克溶液A和2000克溶液B,已知B的浓度是A的3倍,求混合后最终的浓度为( ) A21% B.22% C.22.5...

作者: tihaiku 人气: - 评论: 0
问题 向1000克20%的溶液中加入1000克溶液A和2000克溶液B,已知B的浓度是A的3倍,求混合后最终的浓度为( ) A21% B.22% C.22.5% D.23%
选项
答案 C
解析 假设A的浓度为X,B的浓度为3X,代入求出最红的浓度为22.5%,故本题答案为C。

相关内容:1000克,溶液,2000克,浓度,混合,C.22.5...

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