Mixtures are two or more substances that are not chemically combined. Which of the following statements is true about the mixture? - Oatmeal with raisins is a homogeneous mixture.
- Cranberry juice is a homogeneous mixture.
- Milk is a pure substance, not a mixture
- Pepsi is a heterogeneous mixture

Which of the following describes the entropy change as a solution is made from a liquid and solid

The allotropes of carbon include a variety of structures that include three-dimensional tetrahedral lattices, planes of hexagonal rings, cylindrical tubes of hexagonal rings, and spheres of five- and six-membered rings. similar shapes of network covalent atomic solids are possible with carbon nitride, boron, and pure silicon (e.g., silicene is a graphene-like allotrope of pure silicon). in contrast, silicates exist as either highly ordered or amorphous (more random) three-dimensional lattices. what could explain why there are there no naturally occurring sheets, stacked sheets, cylindrical tubes, or spheres of network covalent atomic solids composed of silicon and oxygen (sio2)? would pure silicate structures make good lubricants or good electrical conductors?

A) equal lines b) parallel lines c) perpendicular lines d) none of the above