Answer:
Average atomic mass = 55.85 amu
Explanation:
Given data:
Abundance of Fe-55 = 15.35%
Abundance of Fe-56 = 84.65%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (15.35×55)+(84.65×56) /100
Average atomic mass = 844.25 + 4740.4/ 100
Average atomic mass = 5584.65 / 100
Average atomic mass = 55.85 amu.
