46. Solving a chemistry problem
4. Determine the surface activity of butyric acid at the boundary of an aqueous solution with air at 20 ° C according to the following data:
S. kmol/m3 0 0.02 0.05 0.104 0.246
σ, dyn/cm 72.53 68.12 63.53 58.6 50.3
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