Problem: Bromine has two naturally occurring isotopes. One of them, bromine-79, has a mass of 78.9183 amu and a natural isotopic abundance of 50.69%. Calculate the m/m % of the other isotope, bromine-81. Note: m/m % stands for the mass of Br-81 in grams contained in 100 grams of bromine element. 

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Bromine has two naturally occurring isotopes. One of them, bromine-79, has a mass of 78.9183 amu and a natural isotopic abundance of 50.69%. Calculate the m/m % of the other isotope, bromine-81.

Note: m/m % stands for the mass of Br-81 in grams contained in 100 grams of bromine element.