One litre vessel having 20 g charcoal (density 2.0 g/cm3 ) was filled with a gas at 300 K. The pressure of a gas was 760 torr. Due to adsorption the pressure of gas falls to 608 torr. What is the no. of gas molecule adsorbed per g of charcoal?
a. 2.4×1021
b. 2.4×1020
c. 2.4×1022
d. 2.4×1023