ответ: 2
4HCl + MnO₂ = Cl₂ + MnCl₂ + 2H₂O
Cl₂ + H₂ = 2HCl
HCl + NaOH = NaCl + H₂O
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ответ: 2
4HCl + MnO₂ = Cl₂ + MnCl₂ + 2H₂O
Cl₂ + H₂ = 2HCl
HCl + NaOH = NaCl + H₂O