Avogadro’s Number

This number is called Avogadro’s number, named after Amadeo Avogadro (1776–1856).

One mole of marbles corresponds to

6.022 × 1023 marbles.

One mole of sand grains corresponds to

6.022 × 1023 sand grains.

One mole of anything is 6.022 × 1023 units of that thing.