PTHH: 2CO+O2to→2CO2 (1)

                4H2+O2to→2H2O  (2)

b) Ta có:

ΣnO2=\(\dfrac{9,6}{32}\)=0,3(mol)

nCO2=\(\dfrac{8,8}{44}\)=0,2(mol)

⇒{nO2(1)=0,1mol

nO2(2)=0,2mol

⇒{mCO=0,1⋅28=2,8(g)

mH2=0,2⋅2=0,4(g)

 ⇒%mCO=\(\dfrac{2,8}{2,8+0,4}\)⋅100%=87,5%

%mH2=12,5%

\(nO_2=\dfrac{9,6}{32}=0,3\left(mol\right)\)

\(nCO_2=\dfrac{8,8}{44}=0,2\left(mol\right)\)

\(2CO+O_2\underrightarrow{t^o}2CO_2\)

  2        1         2   (mol)

0,2       0,1      0,2   (mol)

\(4H_2+O_2\underrightarrow{t^o}2H_2O\)

4         1         2     (mol)

0,8       0,2      0,4 (mol)

\(mCO=0,2.28=5,6\left(g\right)\)

\(mH_2=0,8.2=0,16\left(g\right)\)

\(\%mCO=\dfrac{5,6.100}{5,6+0,16}=97,22\%\)

\(\%mH_2=100-97,22=2,78\%\)

\(2CO + O_2 \xrightarrow{t^o} 2CO_2\\ 2H_2 + O_2 \xrightarrow{t^o} 2H_2O\\ n_{CO} = n_{CO_2} = \dfrac{8,8}{44} = 0,2(mol)\\ n_{O_2} = \dfrac{n_{CO} + n_{H_2}}{2}=\dfrac{0,2+n_{H_2}}{2} = \dfrac{9,6}{32} = 0,3(mol)\\ \Rightarrow n_{H_2} = 0,4(mol)\\ \%V_{CO} = \dfrac{0,2}{0,2 + 0,4}.100\% = 33,33\%\\ \%V_{H_2} = 100\% - 33,33\% = 66,67\%\\ \%m_{CO} = \dfrac{0,2.28}{0,2.28+0,4.2}.100\%=87,5\%\\ \%m_{H_2} = 100\% - 87,5\% = 12,5\%\)

nCO2 = 8.8/44 =  0.2 (mol) 

nO2 = 9.6/32 = 0.3 (mol) 

2CO + O2 -to-> 2CO2 

0.2____0.1______0.2

2H2 + O2 -to-> 2H2O 

0.4___0.3-0.1

%CO = 0.2*28 / ( 0.2*28 + 0.4*2) * 100% = 87.5%

%H2 = 12.5% 

=> D

\(2CO + O_2\xrightarrow{t^o} 2CO_2(1)\\ n_{CO} = n_{CO_2} = \dfrac{8,8}{44} = 0,2(mol)\\ n_{O_2(1)} = \dfrac{n_{CO_2}}{2} = 0,1(mol)\\ 2H_2 +O_2 \xrightarrow{t^o} 2H_2O(2)\\ n_{H_2} = 2n_{O_2(2)} = 2.(\dfrac{9,6}{32}-0,1) = 0,4(mol)\\ \Rightarrow \%m_{CO} = \dfrac{0,2.28}{0,2.28 + 0,4.2}.100\% = 87,5\%\\ \%m_{H_2} = 100\% - 87,5\% = 12,5\%\)

PTHH: \(2CO+O_2\underrightarrow{t^o}2CO_2\)  (1)

            \(2H_2+O_2\underrightarrow{t^o}2H_2O\)  (2)

Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)\\n_{O_2}=\dfrac{9,6}{32}=0,3\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}n_{CO}=0,2\left(mol\right)\\n_{H_2}=0,4\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}m_{CO}=0,2\cdot28=5,6\left(g\right)\\m_{H_2}=0,4\cdot2=0,8\left(g\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}\%m_{CO}=\dfrac{5,6}{5,6+0,8}\cdot100\%=87,5\%\\\%m_{H_2}=12,5\%\end{matrix}\right.\)

16 nCO2=0,2mol

PTHH: 2CO+O2=>2CO2

         0,2<--0,1<---0,2

=> mO2=0,2.32=6,4g

=> khối lượng Oxi phản ứng với H2 là :

9,6-6,4=3,2g

=> nH2O=3,2:32=0,1mol

PTHH: 2H+O2=>H2O

b)

           0,2<-0,1<-0,2

=> mH2=2.0,2=0,4g

mCO =0,2.28=5,6g

=> m hh=5,6+0,4=6g

CuO+H2-to--->Cu+H2O 

0,6----0,6
nCuO =48/80=0,6 (mol)
==>VH2 =0,6×22,4=13.44(l)

17.

\(n_{Fe}=\dfrac{5,6}{56}=0,1mol\)

\(m_{H_2SO_4}=200.19,6\%=39,2g\)

\(n_{H_2SO_4}=\dfrac{39,2}{98}=0,4mol\)

\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)

0,1 <   0,4                                 ( mol )

0,1       0,1              0,1        0,1   ( mol )

\(V_{H_2}=0,1.22,4=2,24l\)

Chất còn dư là H2SO4

\(m_{H_2SO_4\left(dư\right)}=\left(0,4-0,1\right).98=29,4g\)

\(\left\{{}\begin{matrix}m_{FeSO_4}=0,1.152=15,2g\\m_{H_2}=0,1.2=0,2g\end{matrix}\right.\)

\(m_{ddspứ}=5,6+200-0,1.2=205,4g\)

\(\left\{{}\begin{matrix}C\%_{FeSO_4}=\dfrac{15,2}{205,4}.100=7,4\%\\C\%_{H_2}=\dfrac{0,2}{205,4}.100=0,09\%\\C\%_{H_2SO_4\left(dư\right)}=\dfrac{29,4}{205,4}.100=14,31\%\end{matrix}\right.\)

\(n_{Fe}=\dfrac{5,6}{56}=0,1\left(mol\right)\)
\(m_{H_2SO_4}=\dfrac{200.19,6}{100}=39,2\left(g\right)\)
\(n_{H_2SO_4}=\dfrac{39,2}{98}=0,4\left(mol\right)\)
pthh : \(Fe+H_2SO_4->FeSO_4+H_2\)
 LTL: 
\(\dfrac{0,1}{1}< \dfrac{0,4}{1}\)
=> H2SO4 dư 
=> \(n_{H_2}=0,1mol\)
=> \(V_{H_2}=0,1.22,4=2,24\left(L\right)\)
theo pthh :\(n_{H_2SO_4\left(p\text{ư}\right)}=n_{Fe}=0,1\left(mol\right)\)
=> \(n_{H_2SO_4\left(d\right)}=0,4-0,1=0,3\left(mol\right)\)
=> \(m_{H_2SO_4}=98.0,3.29,4\left(g\right)\)
ta có mdd =5,6+39,2 = 44,8 (g)
\(C\%=\dfrac{5,6}{44,8}.100\%=12,55\)

a) PTHH: \(2CO+O_2\underrightarrow{t^o}2CO_2\)  (1)

                \(4H_2+O_2\underrightarrow{t^o}2H_2O\)  (2)

b) Ta có: \(\left\{{}\begin{matrix}\Sigma n_{O_2}=\dfrac{9,6}{32}=0,3\left(mol\right)\\n_{CO_2}=\dfrac{8,8}{44}=0,2\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}n_{O_2\left(1\right)}=0,1mol\\n_{O_2\left(2\right)}=0,2mol\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}m_{CO}=0,1\cdot28=2,8\left(g\right)\\m_{H_2}=0,2\cdot2=0,4\left(g\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}\%m_{CO}=\dfrac{2,8}{2,8+0,4}\cdot100\%=87,5\%\\\%m_{H_2}=12,5\%\end{matrix}\right.\)

c) PTHH: \(2KMnO_4\underrightarrow{t^o}K_2MnO_4+MnO_2+O_2\uparrow\)

Theo PTHH: \(n_{KMnO_4}=2n_{O_2}=0,6mol\)

\(\Rightarrow m_{KMnO_4}=0,6\cdot158=94,8\left(g\right)\)

$n_{CO_2} = \dfrac{8,8}{44} = 0,2(mol)$

\(2CO+O_2\xrightarrow[]{t^o}2CO_2\)

0,2       0,1       0,2                 (mol)

$n_{O_2} = \dfrac{9,6}{32} = 0,3(mol)$

\(2H_2+O_2\xrightarrow[]{t^o}2H_2O\)

0,4     0,2         0,2              (mol)

\(\%m_{CO}=\dfrac{0,2.44}{0,2.44+0,4.2}.100\%=91,67\%\\ \%m_{H_2}=100\%-91,67\%=8,33\%\)

\(\%n_{CO}=\dfrac{0,2}{0,2+0,4}.100\%=33,33\%\\ \%n_{H_2}=100\%-33,33\%=66,67\%\)

nO2 = 9.6/32 = 0.3 (mol) 

nCO2 = 8.8/44 = 0.2 (mol) 

CO + 1/2O2 -to-> CO2 

0.2_____0.1______0.2 

H2 + 1/2O2 -to-> H2O 

0.4__0.3-0.1

%CO = 0.2*28/(0.2*28 + 0.4*2) * 100% = 87.5%

Chúc bạn học tốt !!!

PTHH: \(2CO+O_2\underrightarrow{t^o}2CO_2\)  (1)

            \(2H_2+O_2\underrightarrow{t^o}2H_2O\)  (2)

Ta có: \(\left\{{}\begin{matrix}n_{CO_2}=n_{CO}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\Rightarrow n_{O_2\left(1\right)}=0,1\left(mol\right)\\\Sigma n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow n_{O_2\left(2\right)}=0,2\left(mol\right)\) \(\Rightarrow n_{H_2}=0,4\left(mol\right)\)

\(\Rightarrow\%V_{H_2}=\dfrac{0,4}{0,4+0,2}\cdot100\%\approx66,67\%\)

\(\Rightarrow\%V_{CO}=33,33\%\)

\(n_{CO_2}=\dfrac{8.8}{44}=0.2\left(mol\right)\)

\(n_{O_2}=\dfrac{9.6}{32}=0.3\left(mol\right)\)

\(2CO+O_2\underrightarrow{t^0}2CO_2\)

\(0.2.......0.1.......0.2\)

\(2H_2+O_2\underrightarrow{t^0}2H_2O\)

\(0.4......0.3-0.1\)

\(\%m_{CO}=\dfrac{0.2\cdot28}{0.2\cdot28+0.4\cdot2}\cdot100\%=87.5\%\)

\(\%m_{H_2}=100-87.5=12.5\%\)

a)

\(2CO + O_2 \xrightarrow{t^o} 2CO_2(1)\\ 2H_2 + O_2 \xrightarrow{t^o} 2H_2O(2) \)

b)

\(n_{CO_2} = \dfrac{8,8}{44} = 0,2(mol)\\ n_{O_2} = \dfrac{9,6}{32} = 0,3(mol)\)

Theo PTHH :

\(n_{CO} = n_{CO_2} = 0,2(mol)\\ n_{O_2(1)} = \dfrac{1}{2}n_{CO_2} = 0,1(mol)\\ n_{H_2} = 2n_{O_2(2)} = 2(0,3-0,1) = 0,4(mol)\)

Vậy :

\(\%m_{CO} = \dfrac{0,2.28}{0,2.28+0,4.2}.100\% = 87,5\%\\ \%m_{H_2} = 100\% - 87,5\% = 12,5\%\)