Problem: A 2.85-g sample of an unknown chlorofluorocarbon decomposes and produces 564mL of chlorine gas at a pressure of 752mmHg and a temperature of 298 K. What is the percent chlorine (by mass) in the unknown chlorofluorocarbon? 

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A 2.85-g sample of an unknown chlorofluorocarbon decomposes and produces 564mL of chlorine gas at a pressure of 752mmHg and a temperature of 298 K. What is the percent chlorine (by mass) in the unknown chlorofluorocarbon? 

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Our data indicates that this problem or a close variation was asked in Chemistry: A Molecular Approach - Tro 2nd Edition. You can also practice Chemistry: A Molecular Approach - Tro 2nd Edition practice problems.