3. Using the BET equation, calculate the specific surface area of the adsorbent from the nitrogen adsorption data:
r/rS 0.1 0.2 0.3 0.4
A*103, m3/kg 0.31 0.71 0.93 1.09
The area occupied by a nitrogen molecule in a dense monolayer is
0.16 nm2, nitrogen density 1.25 kg/m3.

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