Ответ:
4 P + 5 O2 = 2 P2O5
2 Ca + O2 = 2 CaO
C2H4 + 3 O2 = 2 H2O + 2 CO2
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Ответ:
4 P + 5 O2 = 2 P2O5
2 Ca + O2 = 2 CaO
C2H4 + 3 O2 = 2 H2O + 2 CO2