10.03.11 KEYWORDS

· Conservation of Mass –No mass is made or destroyed in a reaction

· Relative Formula Mass – M_r = Mass (in grams) of 1 mole of a substance

· Mole – Amount of substance that contains Avogadro’s Number of particles

· Avogadro’s Number – 6 x 10 ²³

· Limiting Reactant –reactant that will run out during the reaction, making it stop

· dm³ – a litre

· cm³ – a millilitre

· Concentration – amount of substance in 1 dm³ of a solution (usually in mol/dm³, sometimes g/dm³)

· Molar Gas Constant – volume occupied by 1 mole of any gas (24dm³ at 20^oC & 1 atmosphere pressure)