12. At investigation of stearic acid adsorption from n-hexane solution on the steel powder the next results were obtained: 4 7 15 25 C-10³, mol/1 A-10³, 0,81 kg/kg 0,90 10 1,30 1,47 20 1,60 1,70 Using the Langmuir equation calculate the specific area of the steel powder if area per 1 molecule of stearic acid in saturated monolayer equals to 0,20 nm².

Fig: 1