Chapter 6, Problem 68E

Any one molecule can be represented many ways. For example, pentane can be represented as:

$\begin{array}{l}{\text{C}}_{\text{5}}{\text{H}}_{\text{12}}\\ {\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}\end{array}$

Why do chemists use so many different ways to represent the same molecule? What are the advantages and disadvantages of each?