Khí thoát ra là metan CH4 vì metan không pứ với dd Brom
\(n_{CH_4}=\frac{2,24}{22,4}=0,1\left(mol\right)\Rightarrow\%V_{CH_4}=\frac{2,24}{6,72}.100\%=33,3\left(\%\right)\)
\(n_{C_2H_4}=\frac{6,72}{22,4}-0,1=0,2\left(mol\right)\Rightarrow\%V_{C_2H_4}=\frac{0,2.22,4}{6,72}.100\%=66,7\left(\%\right)\)
\(PTHH:C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
(mol)______0,2____0,2_____0,2___
\(m_{sp}=0,2.188=37,6\left(g\right)\\ V_{Br_2}=\frac{0,2}{0,5}=0,4\left(l\right)\)