Correctly balance this equation H202->H2O+O2

2H202 (l) - -> 2H2O (l) + O2 (g)

Explanation:

The balanced equation above represent the decomposition of hydrogen peroxide (H2O2) to yield liquid water (H2O) and liberate oxygen gas (O2) without any heating.

In the laboratory, the rate of decomposition is increased in the presence of manganese (IV) oxide as catalyst.