Question

Hey friends!!! This is the average atomic mass of chlorine.please anyone tell me from where this 75/100 and 25/100 has came????please help!

Answer 1

Here is ur answer :

Average atomic mass :

The  average atomic mass of an element is the sum of the masses  of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).

Average atomic mass of an element =

[ ( Atomic mass of Isotope I × percentage of isotope I ) + ( Atomic mass of Isotope II × percentage of isotope II ) ]

____________________________________

Atomic mass of Isotope I = 35

Percentage of isotope I = 75%

Atomic mass of Isotope II = 37

Percentage of isotope II = 25 %

Average atomic mass of chlorine =

Therfore, average atomic mass of chlorine is 35.5 u

HOPE IT HELPS YOU..

REGARDS

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