Equations chimiques Exercice 6, svp

Al(s) + O₂(g) = Al₂O₃(s) ==> 4 Al(s) + 3 O₂(g) -> 2 Al₂O₃(s)

N₂H₄ + O₂ --> N₂ + H₂O ==> N₂H₄ + O₂ --> N₂ + 2 H₂O

C₂H₆O + O₂ --> CO₂ + H₂O ==> C₂H₆O + 3 O₂ --> 2 CO₂ + 3 H₂O