Equations

• In order to convert cm^3 to dm^3 you divide by 1000
• Relative Formula Mass (Mr) is the relative atomic mass of all atoms in the compound added together.
• Concentration (g/dm^3) = mass (g) / volume (dm^3)
• Mean rate of reaction = Quantity of reactant used OR Quantity of product formed (g/s or cm^3/s) / Time taken
• Chromatography Rf value = distance moved by substance / distance moved by solvent
• Moles = mass (g) / Relative formula mass (Mr)
• Number of particles in a substance = Moles x Avogadro’s number (6.022 x 10^23
• % Yield = (Mass of product actually made / Maximum theoretical mass of product) x100
• Atom economy = (Relative formula mass of desired product from equation / Sum of relative formula masses of all reactants from equation) x100
• Concentration (mol/dm^3) = Moles / Volume (dm^3)
• Volume of gas at room temperature and pressure (dm^3) = moles x 24