1. Расставьте коэффициенты, определите тип реакции:
а) P2О5 +3Н2О →2Н3 2РО4
б) 3Cl2+2Al → 2AlCl3
в) 2 NaNO3 →3 NaNO2+O2↑
г ) KBr +Cl2 → KCl+ Br2↑
д) K2O+ H3PO4 → K3PO4 + H2O
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