化學調配酒精濃度問題 - 酒精
By Gilbert
at 2010-10-10T00:00
at 2010-10-10T00:00
Table of Contents
如何由90%酒精配成200ml之50%酒精溶液?!90%酒精是指90ml酒精+10ml水...
麻煩一下給我詳細答過程不要直接出答案
麻煩一下給我詳細答過程不要直接出答案
Tags:
酒精
All Comments
By George
at 2010-10-12T18:26
at 2010-10-12T18:26
則可以列式如下
( 酒精含量:X 乘以90/100 ) 除以 200ml 等於 1/2
X等於1000/9ml
最後要加的水是 200ml - 1000/9ml = 800/9ml
答:1000/9ml的90%酒精 + 800/9ml的水~~^^
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