What situation in countercurrent extraction is superficially analogous to total reflux in distillation? how does it differ

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

What do you need with it’s not a question your just stating what it says