Classify as either an element, compound, hetero or homogeneous mixture...

Question

1. Water (H2O)

2. Carbon

3. Air

4. Table salt (NACL)

5. Sugar dissolved in water

6. Homogenized milk

7. Granite

8. Oxygen

9. Sand in water

Answer 1

1. Water is a compound as it is made up of two elements hydrogen and oxygen.

2. Carbon is an element. Many compounds of carbon are present. There is a complete separate category of carbon compounds due to its special characteristics of catenation means making long chains with it.

3. Air is a mixture of many gases like oxygen, nitrogen, carbon dioxide, etc

4. NaCl is a compound made up of sodium and chloride. It is an ionic compound made up of sodium and chloride ions.

5. Sugar dissolved in water is an example of homogeneous mixture. As homogeneous mixture is one having the same composition throughout the solution.

6. Homogenized milk is also homogeneous.

7. Granite is a compound

8. Oxygen is a molecule; two oxygen atoms combine together and form a molecule. Nascent oxygen is very reactive and cannot exist as a single atom that’s why two atoms combine together.

9. Sand in water is a heterogeneous mixture as it contains many different things. Hetero means different and generous means composition.