8. Why does salt not dissolve in oil? a. Salt is denser than oil b. Salt and oil do not mix c. Oil is too hot for salt to dissolve d. Salt is too large to dissolve in oil 9. What are the components of air as mentioned in the video? a. Oxygen and hydrogen b. Nitrogen, oxygen, and other gases c. Oxygen and carbon dioxide d. Helium and nitrogen 10. What happens to the properties of a mixture when the composition changes? a. They remain the some b. They become more complex c. They change depending on the amount of components d. They disappear entirely

Question

8. Why does salt not dissolve in oil? a. Salt is denser than oil b. Salt and oil do not mix c. Oil is too hot for salt to dissolve d. Salt is too large to dissolve in oil 9. What are the components of air as mentioned in the video? a. Oxygen and hydrogen b. Nitrogen, oxygen, and other gases c. Oxygen and carbon dioxide d. Helium and nitrogen 10. What happens to the properties of a mixture when the composition changes? a. They remain the some b. They become more complex c. They change depending on the amount of components d. They disappear entirely

Answer 1

8. The correct answer is b. Salt and oil do not mix. This is because salt is a polar molecule, while oil is a non-polar molecule. Polar and non-polar molecules do not mix well together, which is why salt does not dissolve in oil.9. The correct answer is b. Nitrogen, oxygen, and other gases. Air is a mixture of gases, with nitrogen and oxygen being the most abundant components. Other gases, such as argon, carbon dioxide, and trace amounts of other gases, are also present in air.10. The correct answer is c. They change depending on the amount of components. The properties of a mixture, such as its appearance, texture, and behavior, can change depending on the proportion of its components. For example, a mixture of sand and water will have different properties than a mixture of sand and oil.

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