According to le chateliers principle when a change is introduced into a system in chemical equilibrium the equilibrium shifts. a) to the forward reaction. b) to the reverse reaction c) in the direction that relieves the change d) in the direction that requires the most energy

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.