Given that the abundances of isotopes 54fe, 56fe, and 57fe are 5%,90% and 5% respectively, the atomic mass of fe is
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Answer 55.95
Explanation:- formula for calculating atomic mass is sum total of isotope times their relative abundance divided by 100.
= [(54 x5) + (56x90) + (57x5)]/100
= {270 + 5040 + 285}/ 100
= 5595/100
= 55.95
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