Depending on the nature of the reaction and the substance, the units could be electrons, ions, atoms, or molecules.
Molarity Calculation It refers to the number of moles per litre of solution.
Like even one gram of a pure element comprises a huge number of atoms, which is the reason we are using the mole concept.
The present definition of the Mole is defined, but it used to be based on the numbers of atoms in a sample of isotope carbon - 12.
Understanding how the mole applies to mass and the number of entities.
Stacked vertically, a mole of pennies would be 4.