document.write( "Question 1149316: You need a 90% alcohol solution. On hand, you have a 30 mL of a 55% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution? \n" ); document.write( "

Algebra.Com's Answer #770655 by Boreal(15235) $\"\"$ $\"About$

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30 ml of 55% is 16.5 ml of pure alcohol.
\n" ); document.write( "add x ml of pure alcohol
\n" ); document.write( "the solution now has (30+x) ml of 90% alcohol, which is 16.5ml+ x ml pure alcohol
\n" ); document.write( "Those two are equal 27ml+.9x ml=16.5ml +x ml
\n" ); document.write( "10.5 ml=0.1 x
\n" ); document.write( "x=105 ml ANSWER
\n" ); document.write( "total solution is .9 (135)=121.5 ml pure alcohol
\n" ); document.write( "this is 105 ml pure added +16.5 there to begin with. \n" ); document.write( "

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