Question

which statements are true of heterogeneous mixtures? 1) they settle out. 2) the proportions of solute to solvent may vary. 3) the solute is evenly distributed throughout. 4) they are composed of two solvents and two solutes. o 1 and 2 o 2 and 4 o 3 only o 2 only

Explanation:

1. Heterogeneous mixtures can settle out over time as the components are not uniformly distributed. For example, a mixture of sand and water will separate with sand settling at the bottom.
2. In a heterogeneous mixture, the proportions of solute - to - solvent can vary in different parts of the mixture.
3. In a heterogeneous mixture, the solute is not evenly distributed throughout. This is a characteristic of homogeneous mixtures.
4. Heterogeneous mixtures are not necessarily composed of two solvents and two solutes. They can have different combinations and numbers of components.

Answer:

1 and 2