document.write( "Question 899728: What quantity of pure acid must be added to 400 mL of a 50% acid solution to produce a 60% acid solution? \n" ); document.write( "
Algebra.Com's Answer #545571 by josgarithmetic(39617)\"\" \"About 
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Being unknown acid identity, this will work for mass per volume, or for volume per volume percentage concentration:\r
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