1)Ca→CaO→Ca(OH)2→Ca(NO3)2→CaSO4
2)C→CO2→Na2CO3→CO2→СaCO3
3)P→P2O5→H3PO4→Ca(PO4)2→H3PO4→Ca(H2PO4)2
Составьте уравнение реакций, Соответствующие след. превращением.
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