Question

Silicon has three naturally occurring isotopes: Si-28 with mass 27.9769 amu and a natural abundance of 92.21%, Si-29 with mass 28.9765 amu and a natural abundance of 4.69%, and Si-30 with mass 29.9737 amu and a natural abundance of 3.10%. Calculate the atomic mass of silicon.

answer : ( )amu

Answer 1

mass*% + mass*% + mass*% = avg atomic mass Si.
use the fraction instead of %;i.e., use 0.9221 instead of 92.21%

Answer 2

i don't know can you please help it is an summative from 32 please

Answer 3

28.09 amu