Write a balanced chemical equation lead iv oxide decomposes to yield lead ii oxide and a colorless gas?

First, we need to know what are the chemical formulas of the substances involved in the reaction. It is as follows:

Lead IV oxide = PbO2
Lead II oxide = PbO

Then, the balanced chemical reaction be written as:

PbO2 = PbO + 1/2O2(g)

Oxygen should be the colorless gas being produced in the reaction.

257 grams h2o i think