Mole
= 6.02 x 10 ^23
gram formula mass
mass of 1 mole
Percent Composition
the amount of an element in a compound expressed as a %
Hydrates
a salt that has a definite amount of water molecules embedded into it’s surface
Anhydrous Salt
after heating a hydrate the water evaporates and we are left with the anhydrous salt
molecular formula
the true formula for a compound;exact number of atoms of each element in the composition
empirical formula
the simplest whole ratio of the compound
Stoichiometry
the area of chem math where we take a balanced chemical question and use mole ratios to make predictions about the products of the reaction