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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.
= = 0.078078078. So we can see that fractions with a denominator of 9, 99, 999, 9999, are useful for making repeating decimals. All we have to do is to reduce the fraction to its lowest terms. For example, letâs take the repeating decimal 0.027027027â¦.