Question

An element consists of 5.85% of an isotope with mass 53.940 u, 91.75% of an isotope with mass 55.9349 u, 2.12% of an isotope with mass 56.9354 u, and 0.28% of an isotope with mass 57.9333 u. Calculate the average atomic mass, and identify the element.

Answer 1

Answer:

The answer to your question is: 55.84 u. The element is Iron

Explanation:

isotope 1    mass 53.94 u        abundance  5.85%

             2   mass 55.9349      abundance 91.75%

            3    mass 56.9354       abundance 2.12%

             4    mass 57.9333      abundance 0.28%

average atomic mass = (53.94 x 0.0585) + (55.9349 x 0.9175) + (56.9354 x 0.0212) + (57.9333 x 0.0028)

average atomic mass = 3.155 + 51.32 + 1.207 + 0.1622

average atomic mass = 55.84 u. The element is Iron