a) \(n_{Br_2\left(p\text{ư}\right)}=\dfrac{6,4}{160}=0,04\left(mol\right);n_{hh}=\dfrac{13,44}{22,4}=0,6\left(mol\right)\)

PTHH: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

             0,04<--0,04

\(\Rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,04}{0,6}.100\%=6,67\%\\\%V_{CH_4}=100\%-6,67\%=93,33\%\end{matrix}\right.\)

b) \(n_{CH_4}=0,6-0,04=0,56\left(mol\right)\)

PTHH: \(CH_4+2O_2\xrightarrow[]{t^o}CO_2+2H_2O\)

              0,56----------->0,56

            \(C_2H_4+3O_2\xrightarrow[]{t^o}2CO_2+2H_2O\)

              0,04----------->0,08

\(\Rightarrow V_{CO_2}=\left(0,08+0,56\right).22,4=14,336\left(l\right)\)

Bài 3

a) C₂H₄ + Br₂ --> C₂H₄Br₂

C₂H₂ + 2Br₂ --> C₂H₂Br₄

b) \(n_{Br_2}=\dfrac{5,6}{160}=0,035\left(mol\right)\)

Gọi số mol C₂H₄, C₂H₂ là a, b (mol)

=> \(a+b=\dfrac{0,56}{22,4}=0,025\) (1)

PTHH: C₂H₄ + Br₂ --> C₂H₄Br₂

                a---->a

            C₂H₂ + 2Br₂ --> C₂H₂Br₄

                b---->2b

=> a + 2b = 0,035 (2)

(1)(2) => a = 0,015 (mol); b = 0,01 (mol)

=> \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,015}{0,025}.100\%=60\%\\\%V_{C_2H_2}=\dfrac{0,01}{0,025}.100\%=40\%\end{matrix}\right.\)

Bài 4:

a) 

CH₄ + 2O₂ --t^o--> CO₂ + 2H₂O

2H₂ + O₂ --t^o--> 2H₂O

b) 

Gọi số mol CH₄, H₂ là a, b (mol)

=> \(a+b=\dfrac{11,2}{22,4}=0,5\) (1)

PTHH: CH₄ + 2O₂ --t^o--> CO₂ + 2H₂O

              a-------------------->a--->2a

            2H₂ + O₂ --t^o--> 2H₂O

              b--------------->b

=> \(2a+b=\dfrac{16,2}{18}=0,9\) (2)

(1)(2) => a = 0,4 (mol); b = 0,1 (mol)

=> \(\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{0,4}{0,5}.100\%=80\%\\\%V_{H_2}=\dfrac{0,1}{0,5}.100\%=20\%\end{matrix}\right.\)

c) 

V_CO2 = 0,4.22,4 = 8,96 (l)

\(\left\{{}\begin{matrix}C_2H_4:x\left(mol\right)\\C_2H_2:y\left(mol\right)\end{matrix}\right.\)⇒ x + y = \(\dfrac{6,72}{22,4}=0,3\left(1\right)\)

\(C_2H_4 + Br_2 \to C_2H_4Br_2\\ C_2H_2 + 2Br_2 \to C_2H_2Br_4\)

Theo PTHH : 

x + 2y = \(\dfrac{64}{160} = 0,4(2)\)

Từ (1)(2) suy ra: x = 0,2 ; y = 0,1

Vậy :

\(\%V_{C_2H_4} = \dfrac{0,2}{0,3}.100\% = 66,67\%\\ \%V_{C_2H_2} = 100\% - 66,67\% = 33,33\%\)

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

\(Đặt:n_{C_2H_2}=a\left(mol\right),n_{C_2H_4}=b\left(mol\right)\)

\(n_{Br_2}=\dfrac{64}{160}=0.4\left(mol\right)\)

\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

\(\left\{{}\begin{matrix}a+b=0.3\\2a+b=0.4\end{matrix}\right.\)

\(\Leftrightarrow\left\{{}\begin{matrix}a=0.1\\b=0.2\end{matrix}\right.\)

\(\%V_{C_2H_2}=\dfrac{0.1}{0.3}\cdot100\%=33.33\%\)

\(\%V_{C_2H_4}=66.67\%\)

nhh = 6.72/22.4 = 0.3 (mol) 

nBr2 = 64/160 = 0.4 (mol) 

nC2H4 = a (mol) . nC2H2 = b (mol) 

C2H2 + 2Br2 => C2H2Br4

C2H4 + Br2 => C2H4Br2 

=> a + b = 0.3 

a + 2b = 0.4 

=> a =0.2 , b = 0.1 

%VC2H4 =  0.2/0.3 * 100% = 66.67% 

%VC2H2 = 33.33% 

a, vì CH4 là hidrocacbon no => không xảy ra phản ứng với Brom

pt: C2H4 + Br2 -> C2H4Br2

         1         1               1

nBr2 = m/M = 6,4/160 = 0,04 mol => nC2H4 = 0,04 mol

=> VC2H4 = n x 22,4 = 0,04 x 22,4 = 0,896 lit

=> VCH4 = Vhh - VC2H4 = 6,72 - 0,896 = 5,824 lit

b, C%VC2H4 = VC2H4/Vhh = 0,896/6,72 X 100 = 13,33%

=> C%VCH4 = Vhh - VC2H4 = 100% - 13,33% = 86,67%

1. \(n_{Br_2}=0,4.0,5=0,2\left(mol\right)\)

PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

Theo PT: \(n_{C_2H_4}=n_{Br_2}=0,2\left(mol\right)\Rightarrow V_{C_2H_4}=0,2.22,4=4,48\left(l\right)\)

2. \(n_{C_2H_4Br_2}=\dfrac{9,4}{188}=0,05\left(mol\right)\)

PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

Theo PT: \(n_{C_2H_4}=n_{C_2H_4Br_2}=0,05\left(mol\right)\)

\(\Rightarrow\%V_{C_2H_4}=\dfrac{0,05.22,4}{1,4}.100\%=80\%\)

\(\Rightarrow\%V_{CH_4}=100-80=20\%\)

a) C₂H₄ + Br₂ --> C₂H₄Br₂

C₂H₂ + 2Br₂ --> C₂H₂Br₄

b) Gọi số mol C₂H₄, C₂H₂ là a, b (mol)

=> a + b = \(\dfrac{1,68}{22,4}=0,075\left(mol\right)\) (1)

\(n_{Br_2}=\dfrac{16}{160}=0,1\left(mol\right)\)

=> a + 2b = 0,1 (2)

(1)(2) => a = 0,05 (mol); b = 0,025 (mol)

=> \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,05}{0,075}.100\%=66,67\%\\\%V_{C_2H_2}=\dfrac{0,025}{0,075}.100\%=33,33\%\end{matrix}\right.\)

c) 
PTHH: C₂H₄ + 3O₂ --t^o--> 2CO₂ + 2H₂O

           0,05--->0,15

             2C₂H₂ + 5O₂ --t^o--> 4CO₂ + 2H₂O

            0,025-->0,0625

=> V_O2 = (0,15 + 0,0625).22,4 = 4,76 (l)

a.b.\(n_{Br_2}=\dfrac{16}{160}=0,1mol\)

\(n_{hh}=\dfrac{1,68}{22,4}=0,075mol\)

Gọi \(\left\{{}\begin{matrix}n_{C_2H_2}=x\\n_{C_2H_4}=y\end{matrix}\right.\)

\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

  x          2x                            ( mol )

\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

   y           y                           ( mol )

Ta có:

\(\left\{{}\begin{matrix}22,4x+22,4y=1,68\\2x+y=0,1\end{matrix}\right.\)  \(\Leftrightarrow\left\{{}\begin{matrix}x=0,025\\y=0,05\end{matrix}\right.\)

\(\%V_{C_2H_2}=\dfrac{0,025}{0,075}.100=33,33\%\)

\(\%V_{C_2H_4}=100\%-33,33\%=66,67\%\)

c.

\(2C_2H_2+5O_2\rightarrow\left(t^o\right)4CO_2+2H_2O\)

 0,025    0,0625                                   ( mol )

\(C_2H_4+3O_2\rightarrow\left(t^o\right)2CO_2+2H_2O\)

0,05        0,15                                     ( mol )

\(V_{O_2}=\left(0,0625+0,15\right).22,4=4,76l\)

a)

C₂H₄ + Br₂ --> C₂H₄Br₂

b) \(n_{Br_2}=\dfrac{32}{160}=0,2\left(mol\right)\)

PTHH: C₂H₄ + Br₂ --> C₂H₄Br₂

              0,2<---0,2

=> \(\%V_{C_2H_4}=\dfrac{0,2.22,4}{8,96}.100\%=50\%\)

=> \(\%V_{CH_4}=100\%-50\%=50\%\)

CH, và C,H, ??