Chem2.Book2

Mols

The amount of any substance containing as many as particles as there are carbon atoms in exactly 12g of carbon-12

Avocado's constant

The number of particles in one mole of any substance

Molar mass

The mass in grams per mol of a substance

empirical formula

The simplest whole number ratio of atoms of each element in a compound

molecular formula

The actual number of atoms of element in a compound

Hydrated

A complex structure which has water molecules (water of crystallisation) incorporated

Anhydrous

The compound which remains when the water of crystallisation is removed from a hydrated salt

Water of crystallisation

Water molecules which have made up the part of the crystal structure of a compound that can be removed by heating

Molar gas volume

Volume per mol of gas molecules at a stated pressure + temperature (dm^3mol^-1)