Mole (Mol) Definition in Chemistry

A Mole is defined as a chemical unit, defined to be 6.022 x 1023 (Avogadros Constant) entities. In science, this is usually molecules or atoms. The mass of a mole is the gram formula mass of a substance. Examples: 1 mole of NH3 has 6.022 x 1023 molecules and weighs about 17 grams (Nitrogens molecular weight is 14 and Hydrogen is 1, 14 3 17).1 mole of copper has 6.022 x 1023 atoms and weighs about 63.54 grams.