if the isotopic distribution of C-12 and C-14 is 98% and 2% respectively, the number of C-14 atoms in 12 g of carbon is

a)1.032x10^{22 }

b)1.032 x 10^{23}

c)3.88 x 10^{22}

d)1.302 x 10^{22}

and pls explain

14 g of carbon -14 atoms contains = 6.023 × 10^{23 }atoms

1g of carbon -14 atom contains = 6.023 × 10^{23}/14

12g of carbon -14 atom contains = (6.023 × 10^{23 }× 12) / 14

= 5.16 × 10^{23}

^{ }Now its 2% is (5.16 × 10^{23 }× 2 )/100

= 10.32 × 10^{21}

So, the number of C-14 atoms in 12 g of carbon is 10.32 × 10^{21}

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