Hatta number
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The Hatta number was developed by Shirôji Hatta, who taught at Tohoku University.[1] It is a dimensionless parameter that compares the rate of absorption of a solute, A, in a reactive system (NA0) to the rate of absorption of the same solute A in the case of physical absorption (NA0phys).[2]
<math> Ha = \frac{N_{A0}}{N_{A0}^{phys}} </math>