Final answer:
The CO₂ dissolved in water, similar to a saltwater solution, represents a homogeneous mixture with a uniform composition that cannot be visually separated. Homogeneous mixtures include substances like maple syrup and gasoline, while heterogeneous mixtures, like sand and stones, contain substances that remain physically distinct.
Step-by-step explanation:
A homogeneous mixture, or solution, is a type of mixture in which the composition is uniform throughout. This means that the components of the mixture are distributed evenly and cannot be visually separated. One common example is a saltwater solution, where the salt has dissolved completely in the water, creating a mixture that has the same ratio of salt to water in every part of the solution. Another example is the air we breathe, which consists of different gases like oxygen, nitrogen, and argon, mixed uniformly. In contrast, a heterogeneous mixture consists of substances that remain physically separate and can often be observed as distinct parts.
Referring to the provided reference, CO₂ dissolved in water (carbonated water) can be considered a homogeneous mixture because the CO₂ gas dissolves uniformly throughout the water and cannot be seen as separate from the water. Other homogeneous mixtures include substances like maple syrup and gasoline, which remain consistent in composition and appearance throughout. Comparatively, mixtures like sand and stones do not blend uniformly and are therefore classified as heterogeneous mixtures.