А. O2+2Ca=2CaO
CaO+H2O=Ca(OH)2
Б. 2H2+O2=2H2O
P2O5+3H2O=2H3PO4
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А. O2+2Ca=2CaO
CaO+H2O=Ca(OH)2
Б. 2H2+O2=2H2O
P2O5+3H2O=2H3PO4