Answer:
The most stable conformation of the pentane is drawn in the attached file
Explanation:
The conformational preferences of pentane are similar to ethane and butane. Each dihedral angle adopts a staggered conformation and each internal carbon-carbon bond adopts an anti conformation to minimize the potential energy of the molecule, while less stable conformations have gauche interactions. A gauche-gauche shaper is unfavorable because the methyl groups are aligned with parallel links in close proximity
