equations

• name the relative formula mass equation.

  relative formula mass of all atoms in the compound together
• give the concentration equation (g/dm3)

  concentration (g/dm3) = mass (g) / volume (dm3)
• give the equation for the mean rate of a reaction

  mean rate of reaction (g/s or cm3/s)

  =

  quantity of reactant used OR quantity of product formed / time taken
• name the chromatography Rf value equation

  distance of moved substance / distance of moved solvent
• give the equation of moles

  moles = mass (g) / relative formula mass
• the equation for the number of particles in a substance is:

  moles X Avogadro's number
• the equation for % yield

  mass of product actually made

  ______________________ x 100

  maximum theoretical mass of product
• The question for atom economy is

  relative formula mass of the desired product

  ————————————————————————— x 100

  sum of relative formula masses of all reactants
• What is the equation for concentration (mol/dm3) = moles / volume ( dm3)
• Volume of gas at room temperature and pressure (dm3) = moles x 24
• remember to covert cm3 to dm3 you need to divide by 1000