C-12 and C-14 isotopes are found as 98% and 2% respectively in any sample. Number of atoms of C-14 in 12 g of sample will be

Options

A. 1.5 mole atoms
B. `1.03 xx 10^22` atoms
C. `3.06 xx 10^22` atoms
D. `3.08 xx 10^23 ` atoms

Answer

B

Explanation

No. of C attoms of C -14 in 12g of sample
` = (12 xx 2)/(100 xx 14) xx 6.02 xx 10^23 =1.032 xx 10^22`