Расставить коэфиценты, помогите, пожалуйста.
Zn + C = ZnC
Fe + O₂ = Fe₂O₃
HgO = Hg + O₂
Ca + O₂ = CaO
H₂ + O₂ = H₂O
So₂ = So₃
N₂ + O₂ = NO
Mg + HNO₃ = Mg(NO₃)+H₂
Al(OH)₃ + H₂SO₄ = Al₂(SO₃)+H₂O
NaOH + H₂SO₄ = Na₂SO₄ + H₂O
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