Расставьте коэффициенты в следующих уравнениях химических реакций:
N2 + H2 -> NH3,
MnO2 + H2 Mn + H2O,
AI+ Cl2 -
CaO + P2O5
КОН + H2SO4 -
ZnS + O2 -> ZnO + SO2.
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