1 g charcoal show chemical adsorption of some acetic acid on coming in contact with 100 mL of 0.50 M acetic acid and the molarity of acetic acid is reduced to 0.49 M. If surface area of charcoal is 3.015×102 m2/g , the surface area of each chemically adsorbed molecule of acetic acid is :
a. 3.015×10−2 m2
b. 5×10−19 m2
c. 2.5×10−19 m2
d. 1.25×10−19 m2