a)

\(n_{O_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

\(n_{H_2O}=\dfrac{1,8}{18}=0,1\left(mol\right)\)

PTHH: 2H₂ + O₂ --t^o--> 2H₂O

            0,1<-0,05<-------0,1

            2CO + O₂ --t^o--> 2CO₂

            0,2<--0,1-------->0,2

=> \(\left\{{}\begin{matrix}V_{H_2}=0,1.22,4=2,24\left(l\right)\\V_{CO}=0,2.22,4=4,48\left(l\right)\end{matrix}\right.\)

b) \(m_{CO_2}=0,2.44=8,8\left(g\right)\)

\(n_{O_2}=\dfrac{3,36}{22,4}=0,15mol\)

\(n_{H_2O}=\dfrac{1,8}{18}=0,1mol\)

\(2CO+O_2\rightarrow2CO_2\)

  a         0,5a     a

\(2H_2+O_2\rightarrow2H_2O\)

 0,1   0,05 \(\leftarrow\)    0,1

\(\Sigma n_{O_2}=0,5a+0,05=0,15\)

\(\Rightarrow a=n_{O_2\left(CO\right)}=0,2mol\)

\(V_{CO}=2\cdot0,2\cdot22,4=8,96l\)

\(V_{H_2}=0,1\cdot22,4=2,24l\)

\(m_{CO_2}=0,2\cdot44=8,8g\)

\(a)\\ 2CO + O_2 \xrightarrow{t^o} 2CO\\ 2H_2 + O_2 \xrightarrow{t^o} 2H_2O\\ n_{H_2} = n_{H_2O} = \dfrac{1,8}{18} = 0,1(mol)\\ \)

Theo PTHH :

\(2n_{O_2} = n_{CO} + n_{H_2}\\ \Leftrightarrow 2.\dfrac{3,36}{22,4} = n_{CO} + 0,1\\ \Leftrightarrow n_{CO} = 0,2(mol)\\ \%V_{H_2} = \dfrac{0,1}{0,1+ 0,2}.100\% = 33,33\%\\ \%V_{CO} = 100\%-33,33\% = 66,67\%\\ c) Cách\ 1 :\\ n_{CO_2} = n_{CO} = 0,2(mol)\\ m_{CO_2} = 0,2.44 = 8,8(gam)\\ Cách\ 2 : \\ m_{hh} = m_{CO} + m_{H_2} = 0,2.28 + 0,1.2 = 5,8(gam) \)

Bảo toàn khối lượng :

\(m_{hh} + m_{O_2} = m_{H_2O} + m_{CO_2}\\ \Rightarrow m_{CO_2} = 5,8 + 0,15.32 - 1,8 = 8,8(gam)\)

a, \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)

\(2C_2H_2+5O_2\underrightarrow{t^o}4CO_2+2H_2O\)

Ta có: \(n_{CH_4}+n_{C_2H_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\left(1\right)\)

\(n_{CO_2}=n_{CH_4}+2n_{C_2H_2}=\dfrac{7,84}{22,4}=0,35\left(mol\right)\left(2\right)\)

Từ (1) và (2) \(\Rightarrow\left\{{}\begin{matrix}n_{CH_4}=0,25\left(mol\right)\\n_{C_2H_2}=0,05\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,25.22,4}{6,72}.100\%\approx83,33\%\\\%V_{C_2H_2}\approx16,67\%\end{matrix}\right.\)

Theo PT: \(n_{O_2}=2n_{CH_4}+\dfrac{5}{2}n_{C_2H_2}=0,625\left(mol\right)\Rightarrow m_{O_2}=0,625.32=20\left(g\right)\)

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: \(n_{KMnO_4}=2n_{O_2}=0,6mol\)

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

Gọi \(\left\{{}\begin{matrix}n_{H_2}=a\left(mol\right)\\n_{CO}=b\left(mol\right)\end{matrix}\right.\)⇒ 2a + 28b = 6,8(1)

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

Theo PTHH :

\(n_{O_2} = 0,5a + 0,5b = \dfrac{8,96}{22,4} = 0,4(2)\)

Từ (1)(2) suy ra: a = 0,6 ; b = 0,2

Vậy :

\(\%m_{H_2} = \dfrac{0,6.2}{6,8}.100\% = 17,65\%\\ \%m_{CO} = 100\% - 17,65\% = 82,35\%\)

\(2CO + O_2 \xrightarrow{t^o} 2CO_2(1)\\ 2H_2 + O_2 \xrightarrow{t^o} 2H_2O(2)\\ n_{CO} = n_{CO_2} = \dfrac{4,48}{22,4} = 0,2(mol)\\ n_{O_2(1)} = \dfrac{n_{CO_2}}{2} = 0,1(mol)\\ \Rightarrow n_{H_2} = 2n_{O_2(2)} = 2.(\dfrac{6,72}{22,4}-0,1)=0,4(mol)\\ \%V_{CO} = \dfrac{0,2}{0,2+0,4}.100\% = 33,33\%\\ \%V_{H_2} = 100\% -33,33\% = 66,67\%\)

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

 \(a,2H_2+O_2\rightarrow2H_2O\)

\(2CO+O_2\rightarrow2CO_2\)

Gọi \(a\) là số mol \(H_2\),\(b\) là số mol \(CO\)

\(n_{O_2}=\frac{89,6}{22,4}=4\left(mol\right)\)

Ta có:\(\hept{\begin{cases}2a+28b=68\\0,5+a+0,5b=4\end{cases}}\)

\(\Rightarrow\hept{\begin{cases}a=6\\b=2\end{cases}}\)

\(b,m_{H_2}=6.2=12g\)

\(m_{CO}=2.28=56\left(g\right)\)

\(c,\%V_{H_2}=\frac{6}{8}.100\%=75\%\)

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

a, Có: \(n_{O_2}=\dfrac{21,28}{22,4}=0,95\left(mol\right)\)

Theo ĐLBT KL, có: m + m_O2 = m_CO2 + m_H2O

⇒ m = 28,6 + 14,4 - 0,95.32 = 12,6 (g)

b, Có: \(n_{CO_2}=\dfrac{28,6}{44}=0,65\left(mol\right)\)

\(n_{H_2O}=\dfrac{14,4}{18}=0,8\left(mol\right)\)

BTNT O, có: n_CO + 2n_O2 = 2n_CO2 + n_H2O

⇒ n_CO = 0,65.2 + 0,8 - 0,95.2 = 0,2 (mol)

⇒ m_CO = 0,2.28 = 5,6 (g)

\(\Rightarrow\%m_{CO}=\dfrac{5,6}{12,6}.100\%\approx44,44\%\)

Bạn tham khảo nhé!