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

\(n_{Br_2}=\dfrac{2,4}{160}=0,015mol\)

\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

0,0075  0,015                       ( mol )

\(V_{C_2H_2}=0,0075.22,4=0,168l\)

\(V_{CH_4}=3,36-0,168=3,192l\)

\(\%V_{C_2H_2}=\dfrac{0,168}{3,36}.100=5\%\)

\(\%V_{CH_4}=100\%-5\%=95\%\)

giúp vs nha cần lắm!!!

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

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

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

\(\Rightarrow V=V_{CH_4}=4,48-0,1.22,4=2,24\left(l\right)\)

b, \(n_{CH_4}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

\(\Rightarrow\left\{{}\begin{matrix}\%m_{CH_4}=\dfrac{0,1.16}{0,1.16+0,1.26}.100\%\approx38,1\%\\\%m_{C_2H_2}\approx61,9\%\end{matrix}\right.\)

\(n_{Br_2}=\dfrac{1,92}{160}=0,012\left(mol\right)\)

Gọi số mol C₂H₄, C₂H₂ là a, b (mol)

=> \(a+b=\dfrac{0,224}{22,4}=0,01\) (1)

PTHH: C₂H₄ + Br₂ --> C₂H₄Br₂

               a---->a

             C₂H₂ + 2Br₂ --> C₂H₂Br₄

                 b----->2b

=> a + 2b = 0,012 (2)

(1)(2) => a = 0,008 (mol); b = 0,002 (mol)

=> \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,008}{0,01}.100\%=80\%\\\%V_{C_2H_2}=100\%-80\%=20\%\end{matrix}\right.\)

a)

$C_2H_2 + 2Br_2 \to C_2H_2Br_4$

b) $n_{Br_2} = \dfrac{40.20\%}{160} = 0,05(mol)$

Theo PTHH : $n_{C_2H_2Br_4} = n_{C_2H_2} = \dfrac{1}{2}n_{Br_2} = 0,025(mol)$

$m_{C_2H_2Br_4} = 0,025.346 = 8,65(gam)$

c) $\%V_{C_2H_2} = \dfrac{0,025}{0,5}.100\% = 5\%$

$\%V_{CH_4} = 100\% - 5\% = 95\%$

a, \(n_{Br_2}=\dfrac{48}{160}=0,3\left(mol\right)\)

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

_____0,15____0,3 (mol)

\(\Rightarrow\%V_{C_2H_2}=\dfrac{0,15.22,4}{11,2}.100\%=30\%\)

\(\Rightarrow\%V_{CH_4}=100-30=70\%\)

b, - Khí thoát ra ngoài là CH₄.

\(V_{CH_4}=11,2.70\%=7,84\left(l\right)\)

a.\(m_{dd.Br_2\left(tăng\right)}=m_{C_2H_2}=2,6g\)

\(n_{hh}=\dfrac{5,6}{22,4}=0,25mol\)

\(n_{C_2H_2}=\dfrac{2,6}{26}=0,1mol\)

\(\%V_{C_2H_2}=\dfrac{0,1}{0,25}.100=40\%\)

\(\%V_{CH_4}=100\%-40\%=60\%\)

b.\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)

    0,1         0,2                          ( mol )

\(C_{M\left(dd.Br_2\right)}=\dfrac{0,2}{0,1}=2M\)

\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\\ V_{CH_4}=4,48\left(l\right)\\ \Rightarrow V_{C_2H_2}=11,2-4,48=6,72\left(mol\right)\\ \Rightarrow\%V=\dfrac{6,72}{11,2}.100=60\%\)

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