SOLUTION: How much water should be added to 22mL of 17% alcohol solution to reduce the concentration to 11%

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Question 473860: How much water should be added to 22mL of 17% alcohol solution to reduce the concentration to 11%
Answer by Alan3354(69443) About Me  (Show Source):
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22 ml of 17% = 3.74 ml of alcohol
If 3.74 is 11%, total solution = 3.74/0.11 = 34 ml
34 - 22 = 12 ml to add