PT: \(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\)
Ta có: \(n_{Br_2}=\dfrac{8}{160}=0,05\left(mol\right)\)
Theo PT: \(n_{C_2H_2}=\dfrac{1}{2}n_{Br_2}=0,025\left(mol\right)\)
\(\Rightarrow V_{C_2H_2}=0,025.22,4=0,56\left(l\right)\)
\(\Rightarrow V_{CH_4}=3,36-0,56=2,8\left(l\right)\)