18(IV). The diffusion coefficient D of surfactant micelles in an aqueous solution at 25°C was experimentally determined. Find the micelle diameter, the association number m, and the micellar mass Mmic of the surfactant if the viscosity of the dispersion medium is η = 0.89 mPa*s.
N surfactant variant Formula Diffusion coefficient D*1010, m2/s Surfactant density ρ, g/cm3
IV Sodium octyl sulfate C8H17OSO3Na 2.104 1.15

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