Which molecule has hydrogen bonding?

If you have 2 molecule of hydrogen (H2) where both of the electrons are in the bonding orbital and you want to react it with a molecule of oxygen (O2) to make 2 molecules of water, what have you to do, and how will the s-orbital from hydrogen react with p-orbitals to oxygen to make water?

• Answer:

  The activation energy for the 2 H2 + O2 = 2 H2O reaction is very low. You will get a self-sustaining exothermic reaction by adding a tiny little 20 microjoules of energy; a spark. If done is a large closed container, the amount of energy will be explosive. If done as a flame, combining the two gases, it can achieve a flame as hot as 2000º C, which is 700º hotter than ignited gas jet of just hydrogen reacting with atmospheric oxygen. In fact, using just oxygen and hydrogen, you can easily power a rocket.