Question

silver has two naturally occurring isotopes, one of mass 107amu and other of mass 109amu. Find fraction of abundances for these two isotopes. the atomic mass is 107.8amu.

Answer 1

Let fraction of 107Ag be x.

Therefore fraction of 109Ag is (1-x)

Now taking the weighted average, 107x + 109(1-x)=107.8 (given)

Thus, x=0.6 and (1-x)=0.4

Inform if wrong, approve if correct.