Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(1.3Fe+2O_2-^{t^o}\rightarrow Fe_3O_4\)
\(2.Mg+\dfrac{1}{2}O_2-^{t^o}\rightarrow MgO\)
\(3.4P+5O_2-^{t^o}\rightarrow2P_2O_5\)
\(4.Na+\dfrac{1}{2}Cl_2-^{t^o}\rightarrow NaCl\)
\(5.H_2O-^{đp}\rightarrow H_2+\dfrac{1}{2}O_2\)
1) \(3Fe+2O_2\rightarrow Fe_3O_4\)
2) \(2Mg+O_2\rightarrow2MgO\)
3) \(4P+5O_2\rightarrow2P_2O_5\)
4) \(2Na+Cl_2\rightarrow2NaCl\)
5) \(2H_2O\rightarrow\left(t_o\right)2H_2+O_2\)
Chúc bạn học tốt
1. MgCl2 + 2KOH → Mg(OH)2 + 2KCl
2. Cu(OH)2 + 2HCl → CuCl2 + 2H2O
3. Cu(OH)2 + H2SO4 → CuSO4 + 2H2O
4. FeO + 2HCl → FeCl2 + H2O
5. Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O
6. Cu(NO3)2 + 2NaOH → Cu(OH)2 + 2NaNO3
7. 4P + 5O2 → 2P2O5
8. N2 + O2 → 2NO
9. 2NO + O2 → 2NO2
10. 4NO2 + O2 + 2H2O → 4HNO3
\(n_P=\dfrac{9.3}{31}=0.3\left(mol\right)\)
\(4P+5O_2\underrightarrow{^{^{t^0}}}2P_2O_5\)
\(0.3.....0.375.....0.15\)
\(V_{O_2}=0.375\cdot22.4=8.4\left(l\right)\)
\(m_{P_2O_5}=0.15\cdot142=21.3\left(g\right)\)
PT: 4P + 5O2 → 2P2O5.
Ta có: nP= 9,3/31=0,3(mol)
Theo PT: nO2= 5/4 . nP=5/4 . 0,3=0,375(mol)
=> VO2=0,375.22,4=8,4(lít)
Theo PT: nP2O5=1/2 . nP=1/2 . 0,3=0,15(mol)
=> mP2O5= 0,15.142=21,3(g)
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) \(2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)
\(a,3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)
\(b,4P+5O_2\underrightarrow{t^o}2P_2O_5\)
\(c,4Na+O_2\underrightarrow{t^o}2Na_2O\)
\(d,2Al+6HCl\rightarrow2AlCl_3+3H_2\)
\(e,C_2H_4+3O_2\underrightarrow{t^o}2CO_2+2H_2O\)
\(f,2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)
$a)3Fe+2O_2\xrightarrow{t^o}Fe_3O_4$
$b)4P+5O_2\xrightarrow{t^o}2P_2O_5$
$c)4Na+O_2\xrightarrow{t^o}2Na_2O$
$d)2Al+6HCl\to 2AlCl_3+3H_2\uparrow$
$e)C_2H_4+3O_2\xrightarrow{t^o}2CO_2\uparrow+2H_2O$
$f)2Fe(OH)_3+3H_2SO_4\to Fe_2(SO_4)_3+6H_2O$
4P+5O2--to>2P2O5
4K+O2--to>2K2O
3Fe+2O2-to->Fe3O4
C3H8+5O2--to>3CO2+4H2O
H2S+\(\dfrac{3}{2}\)O2-to-> SO2+H2O
C2H6O +3 O2 -to->2CO2+3H2O
\(4P+5O_2\underrightarrow{t^o}2P_2O_5\\ 4K+O_2\underrightarrow{t^o}2K_2O\\ 3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\\ C_3H_8+5O_2\underrightarrow{t^o}3CO_2+4H_2O\\ 2H_2S+3O_2\underrightarrow{t^o}2H_2O+2SO_2\\ C_2H_6O+3O_2\underrightarrow{t^o}2CO_2+3H_2O\\ 4C_2H_7N+19O_2\underrightarrow{t^o}8CO_2+14H_2O+4NO_2\\ 2C_nH_{2n+2}+\left(3n+1\right)O_2\underrightarrow{t^o}2nCO_2+\left(2n+2\right)H_2O\)
\(n_{Al}=\dfrac{m}{M}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
\(a)PTHH:4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)
4 3 2
0,2 0,15 0,1 (mol)
\(b)m_{Al_2O_3}=n\cdot M=0,1\cdot\left(27\cdot2+16\cdot3\right)=10,2\left(g\right)\\ c)V_{O_2}=n\cdot24,79=0,15\cdot24,79=3,7185\left(l\right).\)
SO2 + 2O2 → 2SO3
Cân bằng sai