\(m_{Br_2}=80g\Rightarrow n_{Br_2}=0,5mol\)

\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

0,5         0,5

\(n_{hh}=\dfrac{28}{22,4}=1,25mol\)

\(\Rightarrow n_{CH_4}=1,25-0,5=0,75mol\)

\(\%V_{CH_4}=\dfrac{0,75}{1,25}\cdot100\%=60\%\)

\(\%V_{C_2H_4}=100\%-60\%=40\%\)

\(n_{Br_2}=\dfrac{m_{Br_2}}{M_{Br_2}}=\dfrac{16}{160}=0,1mol\)

\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)

0,1         0,1                        ( mol )

\(\%V_{C_2H_4}=\dfrac{0,1.22,4}{16,8}.100=13,33\%\)

\(\%V_{CH_4}=100\%-13,33\%=86,67\%\)

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

PTHH: C₂H₄ + Br₂ ---> C₂H₄Br₂

           0,04<---0,04

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

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%

a, \(n_{hh}=\dfrac{7,84}{22,4}=0,35\left(mol\right)\)

\(n_{Br2}=\dfrac{24}{160}=0,15\left(mol\right)\)

\(CH_2=CH_2+Br_2\rightarrow CH_2+CH_2\)

                                       /Br         /Br

 0,15mol<----- 0,15mol

\(nC_2H_4=0,15\left(mol\right)\)

\(\Rightarrow nCH_3=0,35-0,15=0,2\left(mol\right)\)

\(\%VCH_4=\%nCH_4=\dfrac{0,2}{0,35}.100\%=57,14\%\)

\(\%VC_2H_4=100-57,14=42,86\%\)

C₂H₄+Br₂->C₂H₄Br₂

0,15--0,15 mol

n _Br2=\(\dfrac{24}{160}\)=0,15 mol

=>V_C2H4=0,15.22,4=3,36l

=>V_CH4=4,48-3,36=1,12l

Đề thiếu dữ kiện bạn nha

Metan với gì vậy bạn ?

Chất khí thoát ra là metan \(\left(CH_4\right)\) vì metan ko tác dụng với dd Brom

a) \(PTHH:C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

b) \(\%V_{CH_4}=\dfrac{4,48}{13,44}.100\%\approx33,33\%\%\\ V_{C_2H_2}=100\%-33,33\%=66,67\%\)

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

b, - Khí thoát ra là CH₄ ⇒ V_CH4 = 6,72 (l)

\(\Rightarrow\left\{{}\begin{matrix}\%V_{CH_4}=\dfrac{6,72}{13,44}.100\%=50\%\\\%V_{C_2H_2}=50\%\end{matrix}\right.\)

a. PTHH: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

a. Vì CH₄ không phản ứng với dd Br₂ nên

       \(V_{CH_4}=6,72\left(l\right)\)

\(\%V_{CH_4}=\dfrac{6,72}{13,44}x100\%=50\%\)

\(\%V_{C_2H_2}=100\%-50\%=50\%\)

\(a/C_2H_4+Br_2\xrightarrow[]{}C_2H_4Br_2\\ b/n_{Br_2}=\dfrac{16}{160}=0,1\left(mol\right)\\ C_2H_4+Br_2\xrightarrow[]{}C_2H_4Br_2\\ \Rightarrow n_{Br_2}=n_{C_2H_4}=n_{C_2H_4Br_2}=0,1mol\\ \%V_{C_2H_4}=\dfrac{0,1.22,4}{11,2}\cdot100\%=20\%\\ \%V_{CH_4}=100\%-20\%=80\%\\ c/C_{MBr_2}=\dfrac{0,1}{0,2}=0,5\left(M\right)\)