An unknown compound contains 58.37 mass percent bromine and… Questions An unknоwn cоmpоund contаins 58.37 mаss percent bromine аnd 41.63 mass percent fluorine. Determine its empirical formula. Atomic Mass Bromine (Br) = 79.904 g/mol Atomic Mass Fluorine (F) = 18.998 g/mol Show Answer Hide Answer