The pressure of a mixture of gases is 855 mmHg. The gases in this mixture have the following partial pressures: CO2 = 0.25 atm, O2 = 0.55 atm, N2 = 0.14 atm. Hy is also present, what will be its partial pressure,
in atmospheres? Round your answer to 2 significant figures.

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.