Question

Isotop klorin adalah 35Cl dan 37Cl.Massa atom relatif klorin = 35,5 .Hitunglah presentasi masing-masing isotop tersebut

Answer 1

Persen 35Cl = x
persen 37Cl = 100 - x

Ar = [ (% × A1) + ( % × A2) ] ÷ 100
35,5 = [( x × 35) + ( ( 100 - x) × 37)] ÷ 100
3550 = 35x + 3700 - 37x
x = 75

persen 35Cl = 75%
persen 37Cl = 100 - 75 = 25%