The mole establishes a relationship between the?

The mole establishes a relationship between the mass of a substance and the number of particles (atoms, molecules, ions, etc.) in that substance.

Here's how it works:

* One mole of any substance contains 6.022 x 10^23 particles. This number is known as Avogadro's number.

* The mass of one mole of a substance is its molar mass. The molar mass is expressed in grams per mole (g/mol).

Therefore, the mole provides a way to convert between the macroscopic world (grams) and the microscopic world (number of particles).

For example, knowing that the molar mass of carbon is 12.01 g/mol, we can say:

* 12.01 grams of carbon contains 6.022 x 10^23 carbon atoms.

* 1 mole of carbon contains 6.022 x 10^23 carbon atoms.

This relationship is crucial in chemistry for calculations involving stoichiometry, chemical reactions, and many other areas.