100*0.05/(100-X)=0.1
5=10-0.1X
0.1X=5
X=50
在需要蒸发50克水
现有浓度为5%的盐水100克,要把它变成浓度是10%的盐水,需要在蒸发掉水多少克
现有浓度为5%的盐水100克,要把它变成浓度是10%的盐水,需要在蒸发掉水多少克
数学人气:109 ℃时间:2019-12-20 17:03:39
优质解答
我来回答
类似推荐
猜你喜欢
- 1一项工程,甲乙合作8天完成,如果甲先独做6天,然后乙再做9天完成任务,乙需独做多少天完成任务?
- 2He didn’t come to the party yesterday,or I __________ him.
- 3英语翻译
- 4已知α为第二象限角,且sinα=√15/4,求sinα÷sin(α+π/2)+cosα+1的值
- 5Keep working hard,and you will s some day
- 6I need a lot of energy.对a lot of提问
- 7求翻译英语长句
- 8If you don't know the answer,you can___with your classmates.(/dis'kAs/)
- 9量杯里有4/5升果汁,平均分给3个小朋友喝,每人喝这杯果汁的几分之几?每人可以喝多少升?
- 10to teach english is her job/teaching english is her job?