2%戊二醛怎么兑成0.78％-天气预报

天气预报 > 财经 > 2%戊二醛怎么兑成0.78％

2%戊二醛怎么兑成0.78％

更新时间： 2021-01-12 20:01:06

1、在原消毒水中加入1.56倍质量的水。

2、根据溶液的相关知识，溶剂质量=溶液质量*浓度，设溶液的质量为a，需要在原溶液中加入质量为X的水，则根据题设有：

2%a/(a+X)=0.78%

即2%a=0.78%a+0.78%X

合并同类项得0.78%X=1.22%a

将系数化为1，则X=1.56a，即需要在原来的消毒水中加入1.56倍的水。

关键词：怎么

2%戊二醛怎么兑成0.78％相关经验

天气预报

最新推荐

页面:/news/view-1753226/ | 耗时:0.4254 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=1753226 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1753226 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1753226 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(807072,1498839,1597588,670271,3870961,3503862,442640,1143536,860347,1416738,2852298,836573,3432514,1228502,3425944,2668294,568360,3457415,981656,692842,2538025,572990,2452179,1134587,3458054,915434,915778,2433067,489285,1017644) ORDER BY field (ArticleID,807072,1498839,1597588,670271,3870961,3503862,442640,1143536,860347,1416738,2852298,836573,3432514,1228502,3425944,2668294,568360,3457415,981656,692842,2538025,572990,2452179,1134587,3458054,915434,915778,2433067,489285,1017644)