11. Calculate the average atomic mass of chlorine using the following data.
Molar mass
% Natural abundance
35CI 75.77
37CI 24.23
84.9689
36.9659
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now,
average atomic mass =% natural abundance of ³⁵Cl * molar mass +% natural abundance of ³⁷Cl * molar mass
= 75.77 × 34.9689/100 + 24.23 × 36.9659/100
= 26.4959 + 8.9568
= 35.4527 g/mol
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Answer:
35CI 75.77 the average
atom mass
a
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