What is the relationship between a mole and Avogadro’s number?

A mole is the mass of Avogadro’s number of particles of a substance.

A mole is the amount of a compound that has Avogadro’s number of carbon-12 atoms in it.

A mole contains Avogadro’s number of particles of a substance.

A mole is the amount of any substance that has the same mass as Avogadro’s number of carbon-12 atoms.