Chapter 3 - Stoichiometry of Formulas and Equations

Mole (mol)

SI unit for the amount of substance. It is defined as the amount of a substance that contains the same number of entities as the number of atoms in 12 g of carbon-12

Avogadro's number

1 mole (1 mol) contains 6.022×1023 entities (to four significant figures)

63.55 amu

Atomic mass of an atom

Molecular formula

actual number of atoms of each element in a molecule

Structural formula

shows the relative placement and connections of atoms in the molecule