Find the number of Faraday’s of electricity required to electrolyse 1 mole water into hydrogen and oxygen is ______ F. 

$2H_{2}O\stackrel{\text{Electrolysis}}{\to }2H_2+O_2$

$36gm\left(2mole\right)4gm32gm$

$4H^{+}+4e^{-}\to 2H_2$

$2O^{2-}-4e^{-}\to O_2$

36 gm  water (2 moles) required 4F of electricity  for  1 mole (18 gm) it is  2F.