a) 

C₂H₄ + Br₂ --> C₂H₄Br₂

C₂H₂ + 2Br₂ --> C₂H₂Br₄

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

=> \(a+b=\dfrac{11,2}{22,4}=0,5\) (1)

PTHH: C₂H₄ + Br₂ --> C₂H₄Br₂

                a---->a

             C₂H₂ + 2Br₂ --> C₂H₂Br₄

                b---->2b

=> a + 2b = \(\dfrac{112}{160}=0,7\) (2)

(1)(2) => a = 0,3 (mol); b = 0,2 (mol)

\(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,3}{0,5}.100\%=60\%\\\%V_{C_2H_2}=\dfrac{0,2}{0,5}.100\%=40\%\end{matrix}\right.\)

\(\left\{{}\begin{matrix}\%m_{C_2H_4}=\dfrac{0,3.28}{0,3.28+0,2.26}.100\%=61,765\%\\\%m_{C_2H_2}=\dfrac{0,2.26}{0,3.28+0,2.26}.100\%=38,235\%\end{matrix}\right.\)

a)

C₂H₄ + Br₂ --> C₂H₄Br₂

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

PTHH: C₂H₄ + Br₂ --> C₂H₄Br₂

              0,2<---0,2

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

=> \(\%V_{CH_4}=100\%-50\%=50\%\)

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

b) Ta có: \(n_{Br_2}=\dfrac{11,2}{160}=0,07\left(mol\right)=n_{C_2H_4}\)

\(\Rightarrow\%V_{C_2H_4}=\dfrac{0,07\cdot22,4}{1,72}\cdot100\%\approx91,16\%\) 

\(\Rightarrow\%V_{CH_4}=8,84\%\)

a) \(C_2H_4 + Br_2 \to C_2H_4Br_2\)

b)

\(n_{C_2H_4} = n_{Br_2} = \dfrac{5,6}{160} = 0,035(mol)\\ \%V_{C_2H_4} = \dfrac{0,035.22,4}{0,86}.100\% = 91,16\%\\ \%V_{CH_4} = 100\% - 91,16\% = 8,84\%\)

n Br2=\(\dfrac{32}{160}\)=0,2 mol

C2H2+2Br2->C2H2Br4

0,1------0,2 mol

=>%VC2H2=\(\dfrac{0,1.22,4}{5,6}\).100=40%

=>%VCH4=100-40=60%

=>n CH4=\(\dfrac{5,6-0,1.22,4}{22,4}\)=0,15 mol

CH4+2O2-to>CO2+2H2O

0,15----0,3

C2H2+\(\dfrac{5}{2}\)O2-to>2CO2+H2O

0,1-----0,25 mol

=>VO2=(0,3+0,25).22,4=12,32l

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

b, - Khí thoát ra là CH₄.

⇒ V_CH4 = 4,48 (l)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{4,48}{11,2}.100\%=40\%\\\%V_{C_2H_4}=100-40=60\%\end{matrix}\right.\)

C2H2+2Br2->C2H2Br4

0,05-----0,1

n Br2=\(\dfrac{16}{160}=0,1mol\)

=>%VC2H2=\(\dfrac{0,05.22,4}{3,36}100\)=33,3%

=>%VCH4=66,7%

Gọi số mol của \(C_2H_2\)  và \(CH_4\)  lần lượt là x và y.

\(C_2H_2+2Br_2\rightarrow CHBr_2+CHBr_2\)

 x           2x

\(CH_4+Br_2\rightarrow CH_3Br+HBr\)

  y         y 

Ta có hệ pt :

\(\left\{{}\begin{matrix}x+y=\dfrac{3,36}{22,4}\\2x+y=\dfrac{16}{160}\end{matrix}\right.\)

Giải hệ ta được : x = -0,05:))

coi lại đề mỗi cái đề cx đưa ko đàng hoàng nx.-.

\(a,n_{Br_2}=\dfrac{6,4}{160}=0,04\left(mol\right)\)

PTHH: C₂H₄ + Br₂ ---> C₂H₄Br₂

           0,04<---0,04

\(\rightarrow\left\{{}\begin{matrix}V_{C_2H_4}=0,04.22,4=0,896\left(l\right)\\V_{CH_4}=2,24-0,896=1,344\left(l\right)\end{matrix}\right.\\ b,\rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,896}{2,24}.100\%=40\%\\\%V_{CH_4}=100\%-40\%=60\%\end{matrix}\right.\)

a, PT: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

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

Theo PT: \(n_{C_2H_2}=\dfrac{1}{2}n_{Br_2}=0,0175\left(mol\right)\)

\(\Rightarrow\%V_{C_2H_2}=\dfrac{0,0175.22,4}{0,86}.100\%\approx45,58\%\)

\(\Rightarrow\%V_{CH_4}\approx54,42\%\)