C3

• Law of conservation mass

  atoms cannot be created or destroyed by chemical reactions the same atoms are present at the start and end
• 6.02 x 10^23
• mass=molar mass x amount
• is the temperature of a reaction increases the reaction is exothermic
• if the temperature of the reaction decreases then the reaction is endothermic
• activation energy is the minimum energy needed for a reaction to start
• endothermic reaction

  
• exothermic reaction

  
• neutralisation is the reaction of an acid with a base to form a salt and water
• electrolysis is when an electric current is passed through a compound
• cathode is negative
• anode is positive
• electroplating uses non inert electrodes to plate a metal at the cathode