Question

Chlorine occurs in two isotopic forms m?What should we take as tge mass of chlorine atom

Answer 1

Here is your answer:

24.47 %  =  24.47 /100 =  0.2447

 

75.53 %  =  75.53 /100  =  0.7553  

Multiply the mass of each isotope by its percent abundance and add. The symbol  

u  is used for atomic mass units.

0.2447(36.9590 u)+0.7553(34.96885 u)  =  35.46 u