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.

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