将50g质量分数为98%的浓硫酸稀释为20%的稀硫酸，需要加水的质量为_刷题宝

题干

将50g质量分数为98%的浓硫酸稀释为20%的稀硫酸，需要加水的质量为（　　）

A：245g

B：195g

C：100g

D：无法计算

上一题下一题 0.0难度选择题更新时间:2019-07-19 11:50:06

答案(点此获取答案解析）

B

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