143. Solving a chemistry problem

6.21–6.40 per multimolecular adsorption.
6.21. Using the BET equation, construct the benzene adsorption isotherm using the following data and calculate the specific surface of the adsorbent from the benzene adsorption isotherm:
P / Ps 0.04 0.08 0.16 0.22 0.27 0.36 0.46
A, mol / kg 0.348 0.483 0.624 0.724 0.805 0.928 0.130
The area occupied by the benzene molecule is assumed to be 0.49 nm2.