Calculate the atomic mass (average) of chlorine using the following data



Q.9:- Calculate the atomic mass (average) of chlorine using the following data :

                  % Natural Abundance             Molar Mass

35Cl                      75.77                              34.9689

37Cl                      24.23                              36.9659

 

 

Answer:-



Fractional Abundance of 35Cl =  0.7577 and Molar mass = 34.9689
Fractional Abundance of 37Cl =  0.2423 and Molar mass = 36.9659
∴ Average Atomic mass = (0.7577×34.9689)amu + (0.2423×36.9659)
= 26.4959 + 8.9568 = 35.4527