Question

If isotopic dirtibution of c12 and c14 is 98.0%and 2.0%respec tively then the no.of c14 atoms in 12g of carbon is

Answer 1

Answer:

14 g of carbon 14 atom has =6.023×1023atoms

1 g of carbon 14 atom has =6.023×1023/14

12 g of carbon 14 atom has =(6.023×1023×12)/14

=5.16×1023

Now its 2% is (5.16×1023×2)/100

=10.32×1021

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