3.3a In all chemical reactions there is a conservation of mass, energy, and charge.
3.3b In a redox reaction the number of electrons lost is equal to the number of electrons
3.3c A balanced chemical equation represents conservation of atoms. The coefficients
in a balanced chemical equation can be used to determine mole ratios in the reaction.
3.3d The empirical formula of a compound is the simplest whole-number ratio of
atoms of the elements in a compound. It may be different from the molecular formula,
which is the actual ratio of atoms in a molecule of that compound.
3.3e The formula mass of a substance is the sum of the atomic masses of its atoms. The
molar mass (gram-formula mass) of a substance equals one mole of that substance.
3.3f The percent composition by mass of each element in a compound can be