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Anton [14]
2 years ago
5

Bromine has isotopes with mass numbers 79 and 81. if average relative atomic mass is 79.908 calculate the percentage of each iso

tope present
Chemistry
1 answer:
NeX [460]2 years ago
8 0

If the abundance of the first isotope is x, the abundance of the second isotope is 1-x.

Substituting into the atomic mass formula,

79.908=79x+81(1-x)\\\\79.908=81-2x\\\\-1.092=-2x\\\\x=0.546

This means the abundance of Bromine-79 is 54.6%, and the abundance of Bromine-81 is 45.4%.

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Explanation:

Hello there!

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