$2H_2 + O_2 \xrightarrow{t^o} 2H_2O$
$2CO + O_2 \xrightarrow{t^o} 2CO_2$
$n_{CO} = n_{CO_2} = \dfrac{17,92}{22,4} = 0,8(mol)$
$\Rightarrow n_{H_2} = \dfrac{13,6 - 0,8.28}{2} = -4,4<0$

$\to$ Sai đề

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: \(n_{KMnO_4}=2n_{O_2}=0,6mol\)

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

a, \(2H_2+O_2\underrightarrow{^{to}}2H_2O\)

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

b, Ta có :

\(n_{O2}=0,8\left(mol\right)\)

\(\left\{{}\begin{matrix}n_{H2}=a\\n_{CO}=b\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}2a+28b=13,6\\0,5a+0,5b=0,8\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}a=1,2\\b=0,4\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}m_{H2}=2,4\left(g\right)\\m_{CO}=11,2\left(g\right)\end{matrix}\right.\)

c, \(\%V_{H2}=\frac{1,2.100}{1,2+0,4}=75\%\)

\(\Rightarrow\%V_{CO}=100\%-75\%=25\%\)

a: \(C+O_2\rightarrow CO_2\)(ĐK: t độ)

x         x          x

\(S+O_2\rightarrow SO_2\)(ĐK: t độ)

y       y         y

b: \(n_{O_2}=\dfrac{11.2}{22.4}=0.5\left(mol\right)\)

Theo đề, ta có hệ:

12x+32y=10 và x+y=0,5

=>x=0,3 và y=0,2

\(m_C=0.3\cdot12=3.6\left(g\right)\)

\(m_S=0.2\cdot32=6.4\left(g\right)\)

c: \(n_{CO_2}=n_C=0.3\left(mol\right)\)

\(n_{SO_2}=n_S=0.2\left(mol\right)\)

\(V_{khí}=22.4\left(0.3+0.2\right)=11.2\left(lít\right)\)

\(n_{O_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)

PTHH :

\(C+O_2\rightarrow\left(t^o\right)CO_2\)

x       x               x 

\(S+O_2\rightarrow\left(t^o\right)SO_2\)

y      y                y

Gọi n C = x 

     n S = y (mol)

Ta có hệ PT :

\(\left\{{}\begin{matrix}12x+32y=10\\x+y=0,5\end{matrix}\right.\)

\(\rightarrow x=0,3;y=0,2\)

\(m_C=0,3.12=3,6\left(g\right)\)

\(m_S=0,2.32=6,4\left(g\right)\)

\(c,V_{hhk}=\left(0,3+0,2\right).22,4=11,2\left(l\right)\)

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)

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

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

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

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

Gọi x, y lần lượt là số mol của Fe và Mg.

Theo đề, ta có: \(56x+24y=13,2\) (*)

Ta có: \(n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)

PTHH:

\(3Fe+2O_2\overset{t^o}{--->}Fe_3O_4\left(1\right)\)

\(2Mg+O_2\overset{t^o}{--->}2MgO\left(2\right)\)

Theo PT₍₁₎: \(n_{O_2}=\dfrac{2}{3}.n_{Fe}=\dfrac{2}{3}x\left(mol\right)\)

Theo PT₍₂₎: \(n_{O_2}=\dfrac{1}{2}.n_{Mg}=\dfrac{1}{2}y\left(mol\right)\)

\(\Rightarrow\dfrac{2}{3}x+\dfrac{1}{2}y=0,2\) (**)

Từ (*) và (**), ta có HPT:

\(\left\{{}\begin{matrix}56x+24y=13,2\\\dfrac{2}{3}x+\dfrac{1}{2}y=0,2\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0,15\\y=0,2\end{matrix}\right.\)

\(\Rightarrow m_{Fe}=0,15.56=8,4\left(g\right)\)

\(m_{Mg}=0,2.24=4,8\left(g\right)\)

đktc là gì ạ