дано
m(CxHyOz) = 11.5 g
V(CO2) = 5.6 L
m(H2O) = 4.5 g
D(возд) = 1.59
CxHyOz-?
M(CxHyOz) = D()* 29 = 1.59 * 29 = 46.11 g/mol
n(C) = n(CO2) = V/Vm = 5.6 / 22.4 = 0.25 mol
n(H) = 2*n(H2O) = 2*(m(H2O) / M(H2O)) = 2*( 4.5 / 18) = 0.5 mol
M(C) = 12 g/mol
m(C) = n(C)*M(C) = 0.25 * 12 = 3 g
M(H) = 1 g/mol
m(H) = n(H)*M(H) = 0.5 * 1 = 0.5 g
m(O) = m(CxHyOz) - (m(C)+m(H)) = 11.5 - (3+0.5) = 8 g
M(O) = 16 g/mol
n(O) = m(O) / M(O) = 8 / 16 = 0.5 mol
n(C) : n(H) : n(O) = 0.25 : 0.5 : 0.5 = 1:2:2
CH2O2 ==> HCOOH
ответ : Муравьиная кислота
1. CuO+H2=Cu+H2O
Cu{2+} + 2e- =Cu{0} | 1
H2{0} - 2e- =2H{+} | 1
2. 3H2+N2=2NH3
H2{0} - 2e- = 2H{+} | 3
N2{0} + 3e- = 2N{3} | 2
3. 4Al+3O2=2Al2O3
Al{0} - 3e- = Al{3+}. | 4
O2{0} + 4e- = 2O{2-} | 3
4. 2KMnO4=K2MnO4+MnO2+O2
Mn{7+} + e- = Mn{6+}. |1
Mn{7+} + 3e- = Mn{4+} |1
2O{2-} - 4e- = O2{0}. |1
5. 2NaNO3=2NaNO2+O2
N{5+} + 2e- = N{3+}. |2
2O{2-} - 4e- = O2{0} |1
6. 4NH3+5O2=4NO+6H2O
N{3-} - 5e- = N{2+}. |4
O2{0} + 4e- = 2O{2-} |5
7. 4NH3+3O2=2N2+6H2O
2N{3-} - 6e- = N2{0} |2
O2 + 4e- = 2O{2-}. |3
8. 8Na++10HNO3=8NaNO3+NH4NO3+3H2O
(тут ошибка в уравнении - не О2, а Н2О в продуктах)
Na{0} - e- = Na{+}. |8
N{5+} + 8e- = N{3-} |1
4) SO3+H2O -> H2SO4
5) SO2 + H2O -> H2SO3
SO2 + 2KOH -> K2SO3 + H2O
6) Al(OH)3 + 3HCl -> AlCl3 + 3H2O
CuCl2 + 2KOH -> Cu(OH)2 + 2KCl
ZnSO4 + 2KOH -> Zn(OH)2 + K2SO4
Fe(OH)3 + 3HNO3 -> Fe(NO3)3 + 3H2O
Fe + 2HCl -> FeCl2 + H2
3 Na2O + 2H3PO4-> 2Na3PO4 + 3H2O
2Cr(OH)3 -> Cr2O3 + 3H2O