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A company wishes to distill a 0.830 mole fraction ethanol (0.170 mole fraction water) solution. To aid in the distillation process, a 0.950 mole fraction benzene (0.050 mole fraction water) mixture containing fresh benzene and a recovered benzene solution is added.
66 2/3% (66*3+2)/3 200/3% (200/3)*(1/100) 2/3 0.66667.6 2/3% (66*3+2)/3 200/3% (200/3)*(1/100) 2/3 0.66667.