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July 31, 2015

Homework Help: Algebra

Posted by Mark on Sunday, September 19, 2010 at 1:33pm.

How many milimiters of pure acid must be added to 150 milimiters of a 30% solution of acid to obtain a 40% solution?

I know that the answer is 25 milileters. Could someone show me with steps how to get the answer.

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