Conservons nos atomes!

ajouter les coefficients qui permettent de vérifier la conservation des atomes dans les équations des transformations suivantes

a) C+O₂⇒CO
b)C+CO₂⇒CO
c)H₂O+O₂⇒H₂O₂
d)CH₄+O₂⇒CO+H₂O
e)H₂O+CH₄⇒CO+H₂

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