The hydrologic cycle maintains a balance of earth's water because evaporation of water is equal to precipitation of watergroundwater is equal to surface waterfreshwater is equal to salt waterevaporation of water is equal to condensation of water

evaporation of water is equal to precipitation of water

Explanation:

An hydrological cycle or water cycle is the cyclic process in which the water circulates between different spheres of the earth in solid, liquid and gaseous forms. It circulates in earth's ocean or any other water body, then the vapors reach upto the atmosphere due to evaporation, where these vapors condense and precipitate into rain or snow, again it becomes part of the water body.

On the basis of the above explanation, evaporation of water is equal to precipitation of water  is the correct option for the maintenance of the balance of the hydrological cycle on earth.

evaporation of water is equal to precipitation of water

Explanation:

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.