Which of the following is a property of a homogeneous mixture?

A homogeneous mixture is characterized by having a consistent composition throughout its entire volume. This means that the individual components of the mixture are evenly distributed at the molecular or ionic level, resulting in a uniform appearance. Examples of homogeneous mixtures include solutions such as saltwater or air, where the different substances cannot be easily identified or separated.

In contrast, the other options describe features that would not be found in homogeneous mixtures. Visible layers or chunks indicate the presence of distinct phases, which would characterize a heterogeneous mixture. Similarly, a mixture that separates upon standing also suggests heterogeneity, as the components diverge based on differences in density or solubility. Lastly, easy identification of components implies that the materials are not uniformly mixed, which again points to a heterogeneous mixture. Hence, option A accurately captures the defining trait of a homogeneous mixture.