Question

Cl-35 and C-37 are twoo isotopes of Cl with at. mass in ratio 3:1 rspectively. Find av. atomic mas of Cl

Answer 1

3*35+37/4=105+37/4=142/4=37.3
ans=37.3

Answer 2

Let there be 100 atoms

% of CL - 35 ATOMS = 75%

% of CL-37 ATOMS = 25%

AVG. ATOMIC MASS OF CL =( 75 × 35+25×37)/100 = 3550/100=35.5....answer

Thank u★★★
#ckc