How many covalent bonds are present in one molecule each of butane and hexane, respectively?

Explanation

Butane, C₄H₁₀, contains three C–C bonds and ten C–H bonds, giving 13 covalent bonds. Hexane, C₆H₁₄, contains five C–C bonds and fourteen C–H bonds, giving 19. Each bond here is a single covalent bond; the counts are unchanged by branching of an acyclic alkane.