Stoichiometry/Math of Chemistry
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12 Terms
gram formula mass
the formula mass expressed in grams instead of atomic mass units
molar mass
the mass of a mole of a substance
mole
the number of atoms of carbon in 12.000 g of carbon-12, 6.02x10²³
avogadro’s number
the number of particles in a mole, 6.02x102²³
percent composition by mass
the
concentration of a solution expressed as the ratio between the mass of the solute and the total mass of the compound
hydrate
a crystalline ionic substance that contains a definite amount of water molecules physically associated with it
anhydrous salt
a hydrate that has been dehydrated
mole ratio
the ratio of the coefficients in a chemical reaction
conversion factor
a ratio of equivalent measurements used to convert a quantity from one unit to another
stoichiometry
calculations of reactants or products in a chemical reaction based on the Law of Conservation
molecular formula
the actual ratio of atoms in a molecule
empirical formula
the simplest integer ratio of atoms bonded in a compound; the skeleton formula
