SOLUTION: What quantity of a 65% acid solution must be mixed with a 35% solution to produce 400 mL of a 50% solution?

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Question 957404: What quantity of a 65% acid solution must be mixed with a 35% solution to produce 400 mL of a 50% solution?
Answer by Alan3354(69443) About Me  (Show Source):
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What quantity of a 65% acid solution must be mixed with a 35% solution to produce 400 mL of a 50% solution?
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50% is the average --> equal amounts