Question

1. calculate the average atomic mass of the element iron(fe) using the following data: isotope % abundance iron - 54 6% iron - 56 92% iron - 57 2%

Explanation:

Step1: Convert percentages to decimals

$6\% = 0.06$, $92\%=0.92$, $2\% = 0.02$

Step2: Multiply mass - percent for each isotope

For Iron - 54: $54\times0.06 = 3.24$
For Iron - 56: $56\times0.92=51.52$
For Iron - 57: $57\times0.02 = 1.14$

Step3: Sum up the products

$3.24 + 51.52+1.14=55.9$

Answer:

$55.9$