Question

Find the mass spectrum of chlorine gas, Cl2, using the following information.

Cl - 35: Natural abundance: 75% and Cl - 37: Natural abundance: 25%.

Answer 1

$avg \: atm \: mass = \frac{m1p1 + m2p2}{100}$

m1= mass of 1st isotope

p1=% abundance of 1st isotope

m2= mass of 2nd isotope

p2=% abundance of 2nd istope

$aam = \frac{35 \times 75 + 37 \times 25 }{100} \\ aam = \frac{2625 + 925}{100} \\ aam = 35.5$