\(n_{hh}=\dfrac{11,2}{22,4}=0,5mol\)
\(m_{Br_2}=5,6g\Rightarrow n_{Br_2}=0,035mol\Rightarrow n_{C_2H_4}=0,035mol\)
\(\Rightarrow n_{C_2H_6}=0,5-0,035=0,465mol\)
a)\(\%V_{C_2H_6}=\dfrac{0,465}{0,5}\cdot100\%=93\%\)
\(\%V_{C_2H_4}=100\%-93\%=7\%\)
b)\(V_{Br_2}=\dfrac{0,035}{2}=0,0175l=17,5ml\)
a) mtăng = mC2H4
=> \(n_{C_2H_4}=\dfrac{5,6}{28}=0,2\left(mol\right)\)
=> \(n_{C_2H_6}=\dfrac{11,2}{22,4}-0,2=0,3\left(mol\right)\)
\(\left\{{}\begin{matrix}\%m_{C_2H_6}=\dfrac{0,3.30}{0,3.30+0,2.28}.100\%=61,644\%\\\%m_{C_2H_4}=\dfrac{0,2.28}{0,3.30+0,2.28}.100\%=38,356\%\end{matrix}\right.\)
b)
PTHH: C2H4 + Br2 --> C2H4Br2
0,2--->0,2
=> \(V_{dd.Br_2}=\dfrac{0,2}{2}=0,1\left(l\right)\)
n C2H4 =\(\dfrac{5,6}{28}\)=0,2 mol
C2H4+Br2->C2H4Br2
0,2------0,2
nC2H6=\(\dfrac{11,2-0,2.22,4}{22,4}\)=0,3 mol
=>m C2H6=0,3.30=9g
=>%mC2H4=\(\dfrac{5,6}{5,6+9}.100=38,35\%\)
=>%m C2H6=61,65%
VBr2=\(\dfrac{0,2}{2}\)=0,1 l=100ml