Some Basic Concepts Of Chemistry Question 18

Question: Given that the abundance of isotopes $ ^{54}Fe $ , $ ^{56}Fe $ and $ ^{57}Fe $ is 5%, 90% and 5%, respectively. The atomic mass of Fe is

Options:

A) 55.85

B) 55.95

C) 55.75

D) 55.05

Show Answer

Answer:

Correct Answer: B

Solution:

The atomic mass of iron is $ =\frac{(5\times 54)+(90\times 56)+(5\times 57)}{100}=55.95 $



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