One thousand pounds per hour of a 40 wt% acetone (A) – 60 wt% water (W) solution is to be reduced to 5 wt% acetone with 400 lbs/hr of 1,1,2-trichloroethane (TCE) as a solvent in a counter-current multistage contact operation. a) Determine the number of stages required for the separation.

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Steady State Model

The steady-state model typically states that the entire universe is always enlarging, although it balances a fixed average density and matter that is being constantly generated to make new galaxies, star forms at a similar rate that the previous ones get indistinguishable due to the growing range and velocity of recession.