Question

If the average atomic mass fo chlorine is 35.5 then find the percentage abundance of the two isotopes of chlorine which have the mass number 35 and 37.

Answer 1

(i) If the percentage abundance of Cl-35 is x , then `(x xx35+(100-x)37)/(100)=35.5`
(ii) `75%` of Cl-35 and 25% of Cl-37.