moles: Moles represent the unit for measuring the amount of substance. In chemistry, it is used to quantify atoms, molecules, or ions present in a sample.
M (molarity): Molarity represents the concentration of a solute in a solution. It is expressed in moles per liter (mol/L).
solution: A solution refers to a homogeneous mixture composed of two or more substances. It consists of a solvent (the component that dissolves other substances) and solutes (the components that are dissolved).