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Solution: A 2.95 - g sample of an unknown chlorofluorocarbon is decomposed and produces 583 mL of chlorine gas at a pressure of 750 mm Hg and a temperature of 298 K. What is the percent chlorine (by mass) in the unknown chlorofluorocarbon?

Problem

A 2.95 - g sample of an unknown chlorofluorocarbon is decomposed and produces 583 mL of chlorine gas at a pressure of 750 mm Hg and a temperature of 298 K. What is the percent chlorine (by mass) in the unknown chlorofluorocarbon?