t℃时，将一定量KNO3的不饱和溶液平均分为三份，分别恒温蒸发出水的质量为5g、10g、15g，析出KNO3晶体的质量依次为a g、b g、c g，则a、b、c三者的关系为_刷题宝

题干

t℃时，将一定量KNO₃的不饱和溶液平均分为三份，分别恒温蒸发出水的质量为5g、10g、15g，析出KNO₃晶体的质量依次为a g、b g、c g，则a、b、c三者的关系为（）

A：c═a+b

B：c═2 b﹣a

C：c═a+2 b

D：c═2 a﹣b

上一题下一题 0.0难度选择题更新时间:2015-06-24 06:42:29

答案(点此获取答案解析）

B

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