a) 2P+3Ca=Ca3P2
б) H3PO4+3NaOH=Na3PO4+3H2
в) NH3+HNO3=NH4NO3
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a) 2P+3Ca=Ca3P2
б) H3PO4+3NaOH=Na3PO4+3H2
в) NH3+HNO3=NH4NO3