Расставьте коэффициенты в схемах химических реакций:
Ca + O2 → CaO ZnCO3 → ZnO + CO2
K + HCl → KCl + H2 Na + P → Na3P
Fe + Cl2 → FeCl3 C + FeO → Fe + CO2
P + S → P2S3 N2 + H2 → NH3
K2O + P2O5 → K3PO4 LiOH + H2S → Li2S + H2O
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