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English, 18.01.2020 04:31, peno211

How many liters each of a 10% acid solution and a 70% acid solution must be used to produce 90 liters of a 20% acid solution? (round to two decimal places if necessary.)

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How many liters each of a 10% acid solution and a 70% acid solution must be used to produce 90 liter...

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