Water and oxygen...........where are you coming from or trying to go here?

2H₂ + O₂ Burns to equal 2H₂O So you get water...as W&F said.

I think you mean what is created as a byproduct of engine combustion though for those who do the hydrogen generator stuff. It is still water but rather steam.

Ok, thanksSome guy at the coffee shop brought this up, I knew it had something to do with water but what he was talking was for chemistery class.