# The isotopic abundance of C-12 and C-14 "is" 98% and 2% respectively. What would be the number of C-14 isotope in 12 g carbon sample?

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The isotopic abundance of C-12 and C-14 "is" 98% and 2% respectively. What would be the number of C-14 isotope in 12 g carbon sample?
A. 1.2xx10^(22)
B. 3.01xx10^(23)
C. 5.88xx10^(23)
D. 6.02xx10^(23)

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M_(avg) = 12xx0.98+140.2=12.04
n_(C^(12))=(12)/(12.04)=0.996
Atoms of C ^(14)=0.996xx(2)/(100)xxN_(A)
=0.997xx10^(21)=9.97xx10^(20)