The dihedral angle in the staggered conformation of CH ₃ CH ₃ is

Step-by-step solution

In the staggered conformation of ethane ( CH ₃ CH ₃ ), the hydrogen atoms on adjacent carbon atoms are positioned as far apart as possible to minimize torsional strain. When viewed along the C-C bond axis (Newman projection), the C-H bonds on the front carbon bisect the H-C-H angles on the back carbon. This arrangement results in a dihedral angle of 60^ between the adjacent C-H bonds. Answer: 60^