Search:
At very high temperature water vapour dissociates significantly :
$2H_2O(g)$ 
$2H_2(g)$ $+$ $O_2(g)$
Each mole of water vapour produces by dissociation .......... mole(s) $H_2$ and .......... mole(s) $O_2$
Click where you want to see the answer ! Finish please this exercise before beginning the next one!