+Mass transfer is the net movement of [Chemical Species](/wiki/chemical_species) from one location to another, often driven by a concentration difference. This fundamental process underlies many [Separation](/wiki/separation) techniques, playing a vital role in natural phenomena and industrial operations.
+## See also
+- [Diffusion](/wiki/diffusion)
+- [Convection](/wiki/convection)
+- [Fluid Dynamics](/wiki/fluid_dynamics)
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