2. Find the specific surface area of the adsorbent using the isotherm of low-temperature nitrogen adsorption
р/рs 0.19 0.3 0.4 0.6 0.8 0.9 0.99
a *10^3, mol/kg 4.5, 5.4 6.5 10.2 14.4 17.0 20.0
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