Unit 3 Gen Chem 1 Review

Taken from Prof Jones notes only

Molecular weight (mw)

Sum of atomic weights of all atoms in a molecule of a substance

Formula weight :fw)

Sum of atomic weights of all atoms in a formula unit of a compound

Mole (mol)

Quanity of substance that contains as many molecules or formula units as the number of atoms in 12 g of Carbon-12

Avogadro’s number

6.02 ×10²³

Molar mass

the mass of one mole of a substance

Percent composition

mass percentage of each element in a compound

Combustion

the process by which your sample has burned to produce carbon dioxide and water

Empirical formula

similpliest whole number ratio of atoms of each element in a molecule

Chemical equation

formulas and symbols describing a chemical reaction

Law of conservation of mass

Mass is neither created nor destroyed in a chemical reaction; it is only rearranged.

Stoichiometry

a numberical relationship between chemical quanitites in a balanced chemical equation