Ta có: nBr2 = 0,05 (mol)
PT: \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
___0,05____0,05 (mol)
\(\Rightarrow\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,05.22,4}{11,2}.100\%=10\%\\\%V_{CH_4}=90\%\end{matrix}\right.\)
⇒ Đáp án: A
Bạn tham khảo nhé!
$C_2H_4 + Br_2 \to C_2H_4Br_2$
n C2H4 = n Br2 = 8/160 = 0,05(mol)
Vậy :
%V C2H4 = 0,05.22,4/11,2 .100% = 10%
%V CH4 = 100% -10% = 90%
Đáp án A
\(n_{hh}=\dfrac{11.2}{22.4}=0.5\left(mol\right)\)
\(n_{Br_2}=\dfrac{8}{160}=0.05\left(mol\right)\)
\(n_{C_2H_4}=0.05\left(mol\right)\)
\(\Rightarrow n_{CH_4}=0.45\left(mol\right)\)
\(\%V_{CH_4}=\dfrac{0.45}{0.5}\cdot100\%=90\%\)
\(\%V_{C_2H_4}=10\%\)