Question

Given that the abundances of isotopes 54fe, 56 fe and 57 fe are 5%, 90% and 5% respectively, the atomic mass of fe is​

Answer 1

Answer:

Molar mass of Fe from the given isotopes is 55.95 g.

Explanation:

Step 1 : Given the abundance and the percentage fraction of the isotopes the formula for getting the atomic mass is :

Atomic mass = Sum of (atomic mass × mole fraction)

Step 2 : Substitute the values in the formula above to get the molar mass.

We have :

(54 × 5/100) + (56 × 90/100) + (57 × 5/100) = 2.7 + 50.4 + 2.85

= 55.95

Molar mass of Fe is 55.95 grams per mole.

Answer 2

Explanation:

Molar mass of Fe from the given isotopes is 55.95 g.