Answer :
Answer: The average atomic mass of naturally occurring silicon is 28.08
Explanation:
Mass of isotope Si-28 = 27.9769265327
% abundance of isotope Si-28 = 92.2297% = [tex]\frac{92.2297}{100}[/tex]
Mass of isotope Si-29 = 28.97649472
% abundance of isotope Si-29 = (4.6932)% = [tex]\frac{4.6832}{100}[/tex]
Mass of isotope Si-30 = 29.97377022
% abundance of isotope Si-30 = (3.0872)% = [tex]\frac{3.0872}{100}[/tex]
Formula used for average atomic mass of an element :
[tex]A=\sum[(27.9769265327\times \frac{92.2297}{100})+(28.97649472\times \frac{4.6832}{100})+(29.97377022\times \frac{3.0872}{100})][/tex]
[tex]A=28.08[/tex]
Therefore, the average atomic mass of naturally occurring silicon is 28.08