Identify the longest, shortest, strongest, and weakest bonds?

A. H3C-C---C-H
B. (H3C-H)>--<(H-CH3)
C. (H-H3C)>--<(CH3-H)
D. H3C-CH2-(CH-CH3)-CH3

Longest: D. H3C-CH2-(CH-CH3)-CH3

Shortest: A. H3C-C---C-H
Strongest: B. (H3C-H)>--<(H-CH3)
Weakest: C. (H-H3C)>--<(CH3-H)

To identify the longest, shortest, strongest, and weakest bonds among the given options, let's break down each molecule and analyze their structures.

A. H3C-C---C-H: This molecule contains a carbon chain with two hydrogen atoms on both ends. The carbon-carbon bonds are represented by three dashes (---), indicating that they are likely to be triple bonds. Triple bonds consist of one sigma bond and two pi bonds and are generally shorter and stronger than single or double bonds.

B. (H3C-H)>--<(H-CH3): This molecule is a disulfide bond, which consists of two sulfur atoms connected by two double bonds. The double bonds are indicated by two dashes (--> and <--). Double bonds are shorter and stronger than single bonds.

C. (H-H3C)>--<(CH3-H): This molecule is an ester bond, which connects an alcohol group (H3C-) with an acid group (CH3-H). It contains one sigma bond and one pi bond. The bond length and strength would depend on the specific ester group.

D. H3C-CH2-(CH-CH3)-CH3: This molecule is a butane molecule with a branch. The carbon-carbon bonds are all single bonds, represented by a single dash (-). Single bonds are longer and weaker compared to double or triple bonds.

Based on the analysis, the answers can be determined as follows:

Longest bond: D. H3C-CH2-(CH-CH3)-CH3 (single bonds)
Shortest bond: A. H3C-C---C-H (triple bonds)
Strongest bond: B. (H3C-H)>--<(H-CH3) (double bonds)
Weakest bond: D. H3C-CH2-(CH-CH3)-CH3 (single bonds)

The longest bond: B, (H3C-H)>--<(H-CH3)

The shortest bond: D, H3C-CH2-(CH-CH3)-CH3

The strongest bond: C, (H-H3C)>--<(CH3-H)

The weakest bond: A, H3C-C---C-H