a)PTHH: C2H2 + 2Br2 ===> C2H2Br4
b) Ta có: nhỗn hợp = \(\frac{6,72}{22,4}=0,3\left(mol\right)\)
nBr2 (phản ứng) = \(\frac{24}{160}=0,15\left(mol\right)\)
Theo PT, nC2H2 = \(\frac{0,15}{2}=0,075\left(mol\right)\)
=> nCH4 = \(0,3-0,075=0,225\left(mol\right)\)
=> \(\left\{\begin{matrix}m_{C2H2}=0,075\times26=1,95\left(gam\right)\\m_{CH4}=0,225\times16=3,6\left(gam\right)\end{matrix}\right.\)
Vậy . . .