Number of moles of oxygen liberated by electrolysis of 90g of water

What is the number of moles of oxygen gas evolved by electrolysis of 180 g of water?

The number of moles of oxygen obtained by the electrolytic decomposition of 90g water is :

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

Electrolysis of water is a decomposition reaction. The sum of mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

The mole ratio hydrogen and oxygen gases liberated during electrolysis of water is