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![](https://rs.olm.vn/images/avt/0.png?1311)
a, 4Na + O2 ---to---> 2Na2O (4 : 1 : 2)
b, P2O5 + 3H2O ---> 2H3PO4 (1 : 3 : 2)
c, 2HgO ---to---> 2Hg + O2 (2 : 2 : 1)
d, 2Fe(OH)3 ---to---> Fe2O3 + 3H2O (2 : 1 : 3)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(4Na+O_2\underrightarrow{^{t^0}}2Na_2O\)
Số nguyên tử Na : Số phân tử O2 : Số phân tử tử Na2O = 4 : 1 : 2
\(P_2O_5+3H_2O\rightarrow2H_3PO_4\)
Số phân tử P2O5 : Số phân tử H2O : Số phân tử H3PO4 = 1 : 3 : 2
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)
b) \(4P+5O_2\underrightarrow{t^o}2P_2O_5\)
c) \(4Na+O_2\underrightarrow{t^o}2Na_2O\)
d) \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
e) \(C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
f) \(2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)
\(a,3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)
\(b,4P+5O_2\underrightarrow{t^o}2P_2O_5\)
\(c,4Na+O_2\underrightarrow{t^o}2Na_2O\)
\(d,2Al+6HCl\rightarrow2AlCl_3+3H_2\)
\(e,C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
\(f,2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)
![](https://rs.olm.vn/images/avt/0.png?1311)
$a)3Fe+2O_2\xrightarrow{t^o}Fe_3O_4$
$b)4P+5O_2\xrightarrow{t^o}2P_2O_5$
$c)4Na+O_2\xrightarrow{t^o}2Na_2O$
$d)2Al+6HCl\to 2AlCl_3+3H_2\uparrow$
$e)C_2H_4+3O_2\xrightarrow{t^o}2CO_2\uparrow+2H_2O$
$f)2Fe(OH)_3+3H_2SO_4\to Fe_2(SO_4)_3+6H_2O$
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
$4Na + O_2 \xrightarrow{t^o} 2Na_2O$
$Na_2O + H_2O \to 2NaOH$
b)
$4P + 5O_2 \xrightarrow{t^o} 2P_2O_5$
$P_2O_5 + 3H_2O \to 2H_3PO_4$
c)
$Mg + 2HCl \to MgCl_2 + H_2$
$2H_2 + O_2 \xrightarrow{t^o} 2H_2O$
$SO_3 + H_2O \to H_2SO_4$
$Mg + H_2SO_4 \to MgSO_4 + H_2$
$FeO + H_2 \xrightarrow{t^o} Fe + H_2O$
d)
$2H_2 + O_2 \xrightarrow{t^o} 2H_2O$
$FeO + H_2 \xrightarrow{t^o} Fe + H_2O$
$3Fe + 2O_2 \xrightarrow{t^o} Fe_3O_4$
d)
$2KMnO_4 \xrightarrow{t^o} K_2MnO_4 + MnO_2 + O_2$
$2Ca + O_2 \xrightarrow{t^o} 2CaO$
$CaO + H_2O \to Ca(OH)_2$
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(4P+5O_2\rightarrow\left(t_o\right)2P_2O_5\)
b) \(3Fe+2O_2\rightarrow\left(t_o\right)Fe_3O_4\)
c) \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
d) \(2Na+2H_2O\rightarrow2NaOH+H_2\)
e) \(P_2O_5+3H_2O\rightarrow2H_3PO_4\)
f) \(CuO+2HCl\rightarrow CuCl_2+H_2O\)
Chúc bạn học tốt
a: \(4P+5O_2\rightarrow2P_2O_5\)
b: \(4Na+O_2\rightarrow2Na_2O\)
c: \(Na_2O+H_2O\rightarrow2NaOH\)