The least number of molecules are present in

Options

A. 2 gm of hydrogen gas
B. 8 gm of oxygen gas
C. 4 gm of nitrogen gas
D. 16 gm of `CO_(2)` (g)

Answer

C

Explanation

(A) Mole of `H_(2)=(2)/(2)=1" mol "=1N_(A)` molecule
(B) Mole of `O_(2)=(8)/(32)=(1)/(4)" mol "=(N_(A))/(4)` molecule
(C ) Mole of `N_(2)=(4)/(28)=(1)/(7)" mol "=N_(A)/(7)` molecule
(D) Mole of `CO_(2)=(16)/(44)=(4)/(11)" mole "=(4N_(A))/(11)` molecule