The volume of nitrogen gas `Vm` (at STP) reqired to cover a sample of silica gel with a monomolecular layer is `129cm^(3)g^(-1)` of gel. Calculate the surface area per gram of the gel if each nitrogen molecule occupies `16.23xx10^(-20)m^(2)` .

Explanation

2246 of `N_2` at STP contain =`60^2` molecules
`12^2 of N_2` at STP will contain.
`=610231/22400` molecules
Area occupied by a single molecules =`10^25` Therefore area, occupied by `3^2` molecules of `N_2`
Therefore surface area per gram of gel =56 f