\(n_{ankan}=x\left(mol\right)\)
\(\Rightarrow n_Y=3x\left(mol\right)\)
\(M_Y=12\cdot2=24\left(\dfrac{g}{mol}\right)\)
\(\)\(BTKL:\)
\(m_{ankan}=m_Y\)
\(\Rightarrow x\cdot M=3x\cdot M_Y\)
\(\Rightarrow M=24\cdot3=72\left(\dfrac{g}{mol}\right)\)
\(\Leftrightarrow14n+2=72\)
\(\Leftrightarrow n=5\)
\(CT:C_5H_{12}\)