Magnesium has three naturally occurring isotopes with masses of 23.99 amu, 24.99 amu, and 25.98 amu and natural abundances of 78

Question

2 years ago

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.99%, 10.00% and 11.01% respectively. How do you calculate the atomic mass of magnesium?

1 answer:

mihalych1998 [28] · Answer 1 · 2022-07-29T13:51:11+03:00

Answer:24.31

Explanation:Contribution made by isotope of mass 23.99= 23.99×78.99=1894.97

Contribution made by isotope of mass 24.99=24.99×10.00=249.9

Contribution made by isotope of mass 25.98=25.98×11.01=286.04

Total contribution=1894.97+249.9+286.04=2430.91

Average mass=2430.91÷100

=24.31