document.write( "Question 944407: A chemist needs to create a 20% acid solution. She has 4L of a 30% acid solution in a 20-L container. How much water should she mix with this solution to decrease the concentration to the desired 20%? \n" ); document.write( "
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A chemist needs to create a 20% acid solution. She has 4L of a 30% acid solution in a 20-L container. How much water should she mix with this solution to decrease the concentration to the desired 20%?
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\n" ); document.write( "Add W liters of water
\n" ); document.write( "30*4 + 0*W = 20*(W + 4)
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