document.write( "Question 359726: A chemistry experiment calls for a 20% solution of copper sulfate. You have 150 milliliters of a 30% solution. How many milliliters of an 18% solution should you add to get a 20% solution? \n" ); document.write( "

Algebra.Com's Answer #256722 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Let x reprsent the milliliters of an 18% solution to add
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document.write( ".30*150ml + .18x = .20(150ml + x)
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document.write( ".30*150ml + .18x = .20*150ml + .20x
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document.write( ".10*150ml = .02x
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document.write( "750ml = x
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document.write( "checking our answer
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document.write( "45 + 135 = .20*900 = 180 \n" );
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