Bài 1:
1.4NH3+5O2→4NO↑+6H2O
2.4Zn+5H2SO4$\xrightarrow{đặc ,nóng} $4ZnSO4+H2S↑+4H2O
3.2Cu(NO3)2$\xrightarrow{t^o} $2CuO+4NO2↑+O2↑
4.3Fe3O4+28HNO3→9Fe(NO3)3+NO↑+14H2O
5.3AgNO3+H3PO4→Ag3PO4+3HNO3
6.2FexOy+(6x-2y)H2SO4$\xrightarrow{đặc ,nóng} $xFe2(SO4)3+(3x-2y)SO2↑+(6x-2y)H2O
7.4Fe(OH)2+2O2+H2O→4Fe(OH)3↓
8.NaAlO2+HCl+H2O→NaCl+Al(OH)3↓
9.6NaOH+Al2(SO4)3→3Na2SO4+2Al(OH)3↓
10.2NO+O2→2NO2
Bài 2:
a.
4Na+O2$\xrightarrow{t^o} $2Na2O
4Al+3O2$\xrightarrow{t^o} $2Al2O3
2Cu+O2$\xrightarrow{t^o} $2CuO
b.
theo đlbt khối lượng:
m kl+m O2=m oxit
⇔8,2+m O2=12,2
⇔m O2=8 g
------------------Nguyễn Hoạt------------------
