Объяснение:
1) 1. 4P+5O2= 2P2O5
2. P2O5+ 3H2O= 2H3PO4
2) 1. 4K+ O2= 2K2O
2. K2O+ H2O= 2KOH
3) 1. 2Ba+O2= 2BaO
2. BaO+ H2O= Ba(OH)2
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Объяснение:
1) 1. 4P+5O2= 2P2O5
2. P2O5+ 3H2O= 2H3PO4
2) 1. 4K+ O2= 2K2O
2. K2O+ H2O= 2KOH
3) 1. 2Ba+O2= 2BaO
2. BaO+ H2O= Ba(OH)2