A large mixer initially contains 7 kg of 29 %wt/wt sugar solution. One entering stream continuously supply a 12 % wt/wt sugar solution in the tank at a rate of 10 kg/h. Another entering stream supplies a 20 % wt/wt sugar solution at a rate of 15 kg/h. Two exit streams from the mixer leaves the tank at the rate of 12 kg/h and 10 kg/h, respectively. Assuming that the solution inside the tank is well stirred, (a) find an equation of the concentration of sugar inside the tank as a function of t. (b) Determine the instantaneous mass of sugar leaving the tank after 1 h.   (Overall Mass Balance: Fluid Mechanics/Momentum Transfer)

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Basic Chemical Calculations (Process and Variables)

A basic chemical calculation involves the application of the law of chemical proportions to various reactions and material and energy balance calculations on various chemical processes. Basic chemical calculation helps students analyze various chemical processes and develop problem-solving skills. The chemical manufacturing processes are divided into unit operations involving physical changes of material and unit processes involving the chemical transformation of materials. For instance, fluid flow, heat transfer, and mass transfer are unit operations, and oxidation, reduction, and pyrolysis are unit processes.