Moles: Quantitive Chemistry: Chemistry: GCSE (9:1)

• Mole


  Avogadro's number of an atom, ion or compound

  
• Formula for moles

  Mass/relative formula mass (Mr)

  
• The mass of 1 mole of any substance=

  formula mass in grams
• mol


  Symbol for moles
• Value of Avogadro constant

  6.02 x 10^23

  
• Avogadro's constant


  The number of atoms, molecules or ions in a mole of a given substance

  
• Relative atomic mass


  The weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12.
• Relative formula mass


  The relative atomic masses of the elements in a compound added together
• Reacting mass


  The amount of one reactant needed to react exactly with another reactant.
• Link between moles and equations

  Multipliers show you the ratio of moles in a reaction
• Reagent


  Reactant
• Limiting reactant (limiting reagent)


  A reactant that is totally used up so it determines the amount of product formed.

  
• Excess


  More than is required to react with the limiting reactant