Question

Bromine has two naturally occurring isotopes, the first of which is 79Br with a mass of 78.904 amu
and an abundance of 50.54%. Calculate the mass of the other isotope.
%abundance Br79 is 50.54%
Other isotope Br is 100-50.54 = 49.46%

(78.904*0.5054) + (mass*0.4946) = 79.904
Solve for mass (other isotope) = ?

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