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Byju's Answer
Standard IX
Chemistry
Percentage Composition
Chlorine has ...
Question
Chlorine has two isotopes,
35
17
Cl
and
37
17
Cl
. Calculate the average atomic mass of chlorine atom (in a.m.u.) based on the given information.
S.No
Isotopes
Percentage abundance
(%)
1
35
17
Cl
75
2
37
17
Cl
25
35.5
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Solution
The correct option is
A
35.5
Average atomic mass =(Atomic mass of isotope 1 x percentage abundance of isotope 1 + Atomic mass of isotope 2 x percentage abundance of isotope 2 )
Average atomic mass =
35
×
75
100
+
37
×
25
100
= 35.5 a.m.u.
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Similar questions
Q.
The ratio of isotopes of
37
17
C
l
and
35
17
C
l
in natural chlorine is 1:3. Calculate the fractional atomic mass of chlorine.
Q.
Calculate the atomic mass (average) of chlorine using the following data:
% Natural Abundance
Molar Mass
35
Cl
75.77
34.9689
37
Cl
24.23
36.9659