Bromine has two naturally occurring isotopes. One of them is Br-81 with a mass of 80.91u and an abundance of 49.46 %.
Answer (1)
Student Expert
11th Jun, 2019
Dear Alfiya, to be precise the abundance of Br-81 is 49.31%. But if you are asking for for 49.46% then the result slightly varies. So here it goes-
If 81 has abundance of 49.46%, then Br-79 must be 100-49.46=50.54. Then, using the average molecular mass formula-
80.916(0.4946) + x(100-49.46) = 79.904. Solve for x.
All the best.
Hope this helps.
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