Which statement about homogeneous mixtures is true?

Homogeneous mixtures are characterized by having a uniform composition throughout their entirety. This means that the individual components are evenly distributed on a molecular level, resulting in a consistent appearance and properties no matter where you sample the mixture. Common examples include solutions like saltwater or vinegar, where the solute is completely dissolved within the solvent.

The first option, which suggests that homogeneous mixtures contain at least two phases, is incorrect since homogeneous mixtures are defined by their single-phase nature. The second option states that they can easily be separated by filtration, which is not accurate. Filtration typically separates heterogeneous mixtures where different phases can be trapped by a filter. The last option posits that homogeneous mixtures must be solids, but this is incorrect as they can also be liquids and gases. Therefore, the highlight of the correct statement is that homogeneous mixtures have a consistent composition, which distinguishes them from heterogeneous mixtures.