The volume of nitrogen gas Um (measured at STP) required to cover a sample of silica get with a mono-molecular layer is `129 cm^(3) g^(-1)` of gel. Calculate the surface area per gram of the gel if each nitrogen molecule occupies `16.2 xx 10^(-20) m^(2).`

Answer

56

Explanation

Surface area per gram of silica gel=area occupied by each `N_2xx` no of `N_2` molecules
`=16.2xx10^(-20)xx{(129/22400)xx6.02xx10^23}=560 m^2`