Osmosis video - Atomic units and moles

Atomic mass units are the most basic units of measurement in chemistry. They provide a way to measure very small quantities of matter and energy. One mass atomic unit is equal to one-twelfth the mass of an atom of carbon-12. Moles are another unit of measurement used in chemistry. A mole is defined as 6.02 x 10^23 atoms or molecules. This number is also called Avogadro's constant. Moles are used to measure large quantities of matter, such as the amount of a chemical substance in a sample.