The adsorption of methane on the solid adsorbent could be described by Langmuir adsorption isotherm. The surface area of 3.4 g of the solid adsorbent is 629 m. One adsorbed methane molecule occupies on the solid surface an area o = 0.25 nm?. One of experiments revealed that at equilibrium pressure 62.9 kPa the capacity of the solid surface for methane adsorption was saturated from 65 %. Determine Langmuir constant for the adsorption process and the adsorption capacity (Nmax) in molg (MWCH4 = 16.043 g mol-')