SOLUTION: A nurse wants to obtain 80 ml of a 7% solution of boric acid by mixing 9% and 12% solutions. How much of each should be used?

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Question 399003: A nurse wants to obtain 80 ml of a 7% solution of boric acid by mixing 9% and 12% solutions. How much of each should be used?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
NO SOLUTION BECAUSE YOU CANNOT MIX 9% & 12% LIQUIDS & GET A 7% MIXTURE.