Suppose that you want to test the effects of different dishwashing detergents on dishes that have food stuck to them. to test the differences, you wash three loads of the same dishes, each with a different type of detergent, all in warm water. you also wash a fourth load of dishes with only warm water.

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.