What does a dilute solution indicate about the number of moles of solute per liter?

A dilute solution is characterized by having a low concentration of solute relative to the solvent. This means that in a given volume of solution, there are fewer moles of solute present. For a solution to be classified as dilute, one would typically find a small number of moles of solute per liter of solution compared to a concentrated solution, where a higher number of moles would be present in the same volume.

This concept is fundamentally linked to how solutions are defined in terms of concentration. The more dilute a solution is, the less solute it contains. Therefore, the correct answer reflects that a dilute solution indicates a low number of moles of solute per liter, which aligns with the definition of dilution in chemistry.