Answer to Question #235984 in General Chemistry for HUGI

Question

Chlorine occurs in two common isotopes. It appears as Cl-35 75.8% of the time and as Cl-37 24.2% of the time. What is its average atomic mass? Express your answer in amu with 2 decimal digits. *

Answer 1

Average atomic mass of chlorine

(35*758/1000) + ( 37*242/1000 )

(26530/1000) + ( 8954/1000)

26.53+8.954

=35.484

=35.48 u