document.write( "Question 701112: to prepare 500 ml of alcohol 20% using alcohol 70% and water. How many milliliters
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to prepare 500 ml of alcohol 20% using alcohol 70% and water. How many milliliters
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\n" ); document.write( "500 ml of 20% = 100 ml of alcohol
\n" ); document.write( "100 ml/0.7 = 142.9 ml of 70%
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