equations

• How to work out the relative formula mass

  -relative atomic mass of all atoms in the compound added together
• how to work out concentration

  mass(g) / volume(dm3)
• chromotagraphy rf value

  • distance moved by substance/ distance moved by solvent
• how to work out moles

  mass/relative formula mass
• nunber of particles in a substance

  moles x avogadro number
• how to work out percentage yield

  mass of product actually made/ theoretical yield x 200
• atom economy

  relative formula mass of what u want(product)/ relative formula mass of all the reactants

  x

  100
• concentration (with moles)

  moles / volume
• volume at gas at room temperature and pressure

  moles x 24
• note about dm3

  cm3 / 1000 = dm3