What does a displayed formula illustrate about a molecule?

A displayed formula is a visual representation of a molecule that shows how atoms are bonded together. It illustrates the relative positions of each atom within the molecule and indicates the number and types of bonds between them, such as single, double, or triple bonds. This detailed depiction allows chemists to understand the structure of the molecule, how the different atoms are arranged, and how they interact with each other.

In contrast, the other options do not capture the full meaning of a displayed formula. For instance, the molecular mass is not shown directly in a displayed formula, nor is it a primary focus. While the empirical formula provides a simple ratio of atoms, it lacks the detailed arrangement that a displayed formula provides. Lastly, the molecular formula gives the number of each type of atom in a compound but does not convey how they are connected or arranged in three-dimensional space. Therefore, the correct answer accurately reflects the comprehensive information conveyed by a displayed formula regarding the arrangement and bonding of atoms in a molecule.