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Question: a tank initially holds 1000 kg of a solution containing...

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A tank initially holds 1000 kg of a solution containing 20% salt by weight. A stream enters at a constant flow rate of 5 kg/min containing 5% salt by weight, and a stream leaves at a constant mass flow rate of 10 kg/min. The contents of the tank are well-stirred.

(a) Determine the time for the salt concentration in the tank to decrease to 10% by weight.

(b) Using the answer for part-a, calculate the total mass of the solution in the tank and the mass of salt in the tank.

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