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a lab assistant wants to make 5 liters of 27.8% acid solutions. if solutions of 50% and 13% are in stock, how many liters of each must be mixed to prepare the solution?

  • math - ,

    just work with the amount of acid in each part. If there's x L of 50% acid,

    .50x + .13(5-x) = .278(5)

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