The first one is 2
The second is 1
The third is 6
And the fourth is 3
2.2 moles of O2 will be produced by the decomposition of 4.4 moles of water.
Answer: the neon gas will possess a greater kinetic energy
Explanation:
The neon gas is smaller in mass than the krypton gas. At the came temperature and pressure, the has with a lesser mass will have greater kinetic energy and move faster than the gas with a greater mass. This follows from Graham's law of diffusion in gasses.