Answer:
1. mixtures
2. substances
3. mixtures
4. substances
5. mixtures
6. substances
7. mixtures
8. substances
9. substances
10. mixtures/substances
Explanation:
1. Saltwater is a homogeneous mixture, or a solution. Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture.
2. Water, H2O, is a pure substance, a compound made of hydrogen and oxygen. Although water is the most abundant substance on earth, it is rarely found naturally in its pure form. Most of the time, pure water has to be created.
3. Vinegar is an example of a homogeneous mixture, and not a pure substance since water, its solute, is dissolved in the solvent, being acetic acid.
4. Carbon dioxide is a pure substance made from two different elements so it is a compound.
5. Air is a homogeneous mixture of the gaseous substances nitrogen, oxygen, and smaller amounts of other substances.
6. Ordinary table salt is called sodium chloride. It is considered a substance because it has a uniform and definite composition.
7. Rain water qua rain water (rain water taken as itself) is a homogeneous mixture. Rain water, as a mixture isolated from random particulates on the ground, has components that cannot be further filtrated out: nitrates, nitrates, phosphates, chlorides, bromides, and other ions that aren't water.
8. Drinking alcohol (ethanol) is a not a mixture, but a pure substance that happens to be a liquid at room temperature and typical atmospheric pressure. It's about 43% ethanol, the rest is mostly water (which makes it a mixture).
9. Pure Substance: The substances that are free from any kind of mixture and contain only one kind of particle are pure substances. Examples of pure substances include iron, aluminum, silver, and gold.
10. Soda is a mixture of water, carbon dioxide gas, and solid sugar. Sugar is dissolved in water, and carbon dioxide is dissolved in water under pressure.
/baking soda is a pure substance because it has a constant composition and a unique set of properties, some of which we have listed.
