(1)第二周期第ⅥA族;离子键、共价键;H 2SiO 3(H 4SiO 4)
(2)
(3)8Al(s)+3Fe 3O 4(s)=9Fe(s)+4Al 2O 3(s) △H=-8aKJ/mol
(4)3Fe 3O 4+28H ++NO 3 -=9Fe 3++14H 2O+NO↑
(5)
(1)第二周期第ⅥA族;离子键、共价键;H 2SiO 3(H 4SiO 4)
(2)
(3)8Al(s)+3Fe 3O 4(s)=9Fe(s)+4Al 2O 3(s) △H=-8aKJ/mol
(4)3Fe 3O 4+28H ++NO 3 -=9Fe 3++14H 2O+NO↑
(5)