Question

If isotopic distribution of c-12 and c-14 is 98% and 2% respectively then the no. Of c-14 atoms in 12gm of carbon is (a) 1.032 1022 (b) 3.0 1022 (c) 5.88 x1023 (d) 6.02 x 1023

Answer 1

Explanation:

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

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

12 g of carbon 14 atom contains =(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 10.32×10^23 which is 1.032 x 10^22

so, (a) is correct ans

Answer 2

Answer:

(a) is correct ans

Explanation:

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

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

12 g of carbon 14 atom contains =(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 10.32×10^23 which is 1.032 x 10^22

so, (a) is correct ans

HOPES IT IS OKK..