Relative atomic and molecular masses, AC and mole

• Find relative molecular mass by by adding up the relative atomic masses of all the atoms present in the molecule
• Relative formula mass is used for ionic compounds since they don't exist as molecules
• Avogadro constant is the amount of atoms in 12g of carbon-12
• Avogadro constant is 6.022x10^23 = 1 mole
• number of moles (n) = mass (m) (in grams) / mass of one mole (M) (in grams)