Chemistry Topic 3 – The Mathematics of Formulas and Equations

Formula mass
The mass of the smallest unit of a compound; the sum of the atomic masses of all the atoms present.
Gram formula mass
The formula mass expressed in grams instead of atomic mass units.
The number of atoms of carbon present in 12.000 grams of C-12.
Percentage composition
Represents the composition as a percentage of each element compared with the total mass of the compound.