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2 answers:
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Answer:
The average mass of iron to be is 54.76 amu.
Explanation:
Formula used to calculate average atomic mass follows:
1)
Mass of Fe-54 isotope = 53.9396 amu
Percentage abundance of Fe-54 = 5.845%
Fractional abundance of Fe-54 = 0.05845
2)
Mass of Fe-56 isotope = 55.9349 amu
Percentage abundance of Fe-56 = 91.754 %
Fractional abundance of Fe-56= 0.91754
3)
Mass of Fe-57 isotope = 56.9354 amu
Percentage abundance of Fe-57 = 2.119%
Fractional abundance of Fe-57 = 0.002119
4)
Mass of Fe-58 isotope = 57.9333 amu
Percentage abundance of Fe-58 = 0.282%
Fractional abundance of Fe-58 = 0.00282
Average atomic mass of iron :
The average mass of iron to be is 54.76 amu.