Question

calculate the average atomic mass of chlorine if it exist, in two isotopes 35 over 17 Cl (75%) and 37 over 17 Cl (25%)

Answer 1

Hlo friend.. Cutiepie Here..

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 =

$= (35 \times \frac{75}{100} + 37 \times \frac{25}{100} )$


$= ( \frac{105}{4} + \frac{37}{4} )$


$= \frac{142}{4}$


$= 35.5$


Therfore, average atomic mass of chlorine is 35.5 u


HOPE IT HELPS YOU..

REGARDS
@sunita

Answer 2

Answer:

Thanks For Answering.....

Explanation:

Thanks.....