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Question
The average atomic mass of an element is calculated by its isotopic percentage but what if the average atomic mass is given and we have to find the percentage of a isotopes??
eg:- average atomic mass of an element exist 16.2 u. What is the percentage of isotopes
16. . 18
. X. X
8. 8
eg:- average atomic mass of an element exist 16.2 u. What is the percentage of isotopes
16. . 18
. X. X
8. 8
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Solution
(16*x) +(1-x)* 18=16.2
16x-18x+18=16.2
-2x=-1.8
2x=1.8
x=1.8/2
x=0.9
percentage of isotope with atomic number 16=0.9
percentage of isotope with atomic number 18=(1-0.9)
=0.1
16x-18x+18=16.2
-2x=-1.8
2x=1.8
x=1.8/2
x=0.9
percentage of isotope with atomic number 16=0.9
percentage of isotope with atomic number 18=(1-0.9)
=0.1
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in the sample?