hchxxhBfncndnd4848 hchxxhBfncndnd4848 19-12-2022 Chemistry Answered bromine has two naturally occurring isotopes (br-79 and br-81) and an atomic mass of 79.904 amu. the mass of br-81 is 80.9163 amu, and its natural abundance is 49.31%. calculate the mass and natural abundance of br-79.