Question

Calculate the average atomic mass for an imaginary element "E" that has the following isotope abundances:

56.67 % E-102.658 amu
43.33% E-104.770 amu

Answer 1

Average atomic mass of E = 103.57 amu

Step-by-step explanation:

Given data:

Average atomic mass of E = ?

Abundance of E-102.658 = 56.67%

Abundance of E-104.770 = 43.33%

Solution:

Average atomic mass of E = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100

Average atomic mass of E = (56.67×102.658)+(43.33×104.770) /100

Average atomic mass of E = 5817.63 + 4539.68 / 100

Average atomic mass of E = 10357.31 / 100

Average atomic mass of E = 103.57 amu.