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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.
Percentage is per-cent which means parts per hundred. One percent is equal to 1/100 fraction: 1% = 1/100 = 0.01. Ten percent is equal to 10/100 fraction: 10% = 10/100 = 0.1. Fifty percent is equal to 50/100 fraction: 50% = 50/100 = 0.5. One hundred percent is equal to 100/100 fraction: 100% = 100/100 = 1.