The quantity used to count the number of particles in a substance, measured in moles
Mole
The amount of a substance that contains 6.02x10^23 particles
Avogadro constant
The number of particles in each mole, 6.02x10^23
The choice of 6.02x10^23 particles per mole is directly linked to the mass of carbon-12, the standard for the measurement of relative atomic masses</b>
Molar mass
The mass in grams of one mole of a substance
The units of molar mass are g/mol
Empirical formula
The simplest whole-number ratio of atoms of each element in a compound
Molecular formula
The number of atoms of each element in a molecule
Relative molecular mass compares the mass of a molecule with the mass of an atom of carbon-12
Relative formula mass compares the mass of a formula unit with the mass of an atom of carbon-12
Hydrated salt
A salt with water molecules as part of its crystalline structure
Removing water from a hydrated salt
1. Bonds holding water in crystal are broken
2. Water is driven off
3. Anhydrous salt remains
Solution concentration
The amount of solute, in moles, dissolved in each 1 dm^3 (1000 cm^3) of solution
