a)
CTPT: CnH2n
\(n_{C_nH_{2n}}=\dfrac{5,88}{14n}=\dfrac{0,42}{n}\left(mol\right)\)
PTHH: CnH2n + H2 --to,Ni--> CnH2n+2
\(\dfrac{0,42}{n}\)----------------->\(\dfrac{0,42}{n}\)
=> \(\dfrac{0,42}{n}\left(14n+2\right)=6,16\)
=> n = 3
=> CTPT: C3H6
b)
CTPT: CnH2n
\(n_{C_nH_{2n}}=\dfrac{3,36}{14n}=\dfrac{0,24}{n}\left(mol\right)\)
PTHH: CnH2n + Br2 --> CnH2nBr2
\(\dfrac{0,24}{n}\)------------>\(\dfrac{0,24}{n}\)
=> \(\dfrac{0,24}{n}\left(14n+160\right)=22,56\)
=> n = 2
=> CTPT: C2H4