1.P-->P2O5-->H3PO4-->Mg3(PO4)2 / Cu3(PO4)2-->CuO 2.C-->CO2-->Na2CO3+HCl-->X / +HCl-->Z

Question

1.P-->P2O5-->H3PO4-->Mg3(PO4)2
/
Cu3(PO4)2-->CuO
2.C-->CO2-->Na2CO3+HCl-->X
/
+HCl-->Z

Answer 1

1.4P+5O2=2p2o5
2.P2O5+3H2=2h3po4
3.3mg(oh)2+2h3po4=Mg3(po4)2+3h2

Comments

3Cuo+2h3po4=CU3( po4) 2+3H2O

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Na2CO3+2HCl -> 2NaCl+CO2+H2O