(1)Si
(2)30.973
(3)H 2CO 3==H 2O+CO 2↑;2NaHCO 3
Na 2CO 3+H 2O+CO 2↑;Mg(HCO 3) 2
MgCO 3↓+H 2O+CO 2↑;NH 4HCO 3
NH 3↑+H 2O+CO 2↑;MgCO 3
MgO+CO 2↑(任写两个合理即可)
(1)Si
(2)30.973
(3)H 2CO 3==H 2O+CO 2↑;2NaHCO 3
Na 2CO 3+H 2O+CO 2↑;Mg(HCO 3) 2
MgCO 3↓+H 2O+CO 2↑;NH 4HCO 3
NH 3↑+H 2O+CO 2↑;MgCO 3
MgO+CO 2↑(任写两个合理即可)