a, \(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
b, \(n_{C_2H_4Br_2}=\dfrac{1,88}{188}=0,01\left(mol\right)\)
Theo PT: \(n_{C_2H_4}=n_{C_2H_4Br_2}=0,01\left(mol\right)\Rightarrow V_{C_2H_4}=0,01.22,4=0,224\left(l\right)\)
\(\Rightarrow V_{CH_4}=20-0,224=19,776\left(l\right)\)
c, \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,224}{20}.100\%=1,12\%\\\%V_{CH_4}=98,88\%\end{matrix}\right.\)
d, \(n_{Br_2}=n_{C_2H_4Br_2}=0,01\left(mol\right)\Rightarrow C_{M_{Br_2}}=\dfrac{0,01}{0,2}=0,05\left(M\right)\)