document.write( "Question 718157: A chemist, has one 30 litre bottle of 15% hydrochloric acid and one 30 litre bottle of
\n" ); document.write( "90% hydrochloric acid. He mixes 20 litres of 60% hydrochloric acid and then pours 5 L of that
\n" ); document.write( "solution into the bottle containing the 90% hydrochloric acid. How strong is the acid in that bottle
\n" ); document.write( "now?\r
\n" ); document.write( "\n" ); document.write( "5+30=35
\n" ); document.write( "0.6(5)+0.9(30)=30\r
\n" ); document.write( "\n" ); document.write( "30/35= ~85.71%\r
\n" ); document.write( "\n" ); document.write( "But that answer is incorrect according to the textbook which said 83.5%... \n" ); document.write( "
Algebra.Com's Answer #440788 by stanbon(75887)\"\" \"About 
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A chemist, has one 30 litre bottle of 15% hydrochloric acid and one 30 litre bottle of 90% hydrochloric acid.
\n" ); document.write( "-------------------------------------- \r
\n" ); document.write( "\n" ); document.write( "He mixes 20 litres of 60% hydrochloric acid and then pours 5 L of that solution into the bottle containing the 90% hydrochloric acid. How strong is the acid in that bottle now?
\n" ); document.write( "---
\n" ); document.write( "Equation:
\n" ); document.write( "acid + acid = acid
\n" ); document.write( "0.60*5 + 0.90*30 = x(35)
\n" ); document.write( "------
\n" ); document.write( "3 + 27 = x(35)
\n" ); document.write( "x = 30/35
\n" ); document.write( "x = 86%
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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