5. Which of the following is not a postulate of the kinetic-molecular theory of

Question

5. Which of the following is not a postulate of the kinetic-molecular theory of gases? a. b. c. All gases consist of atoms and molecules moving randomly in all directions at various speeds The average kinetic energy The molecules. There are no attractive or repulsive forces between gas molecules Gas molecules will eventually stop colliding due to the energy lost in each collision. of gas molecules increases as the temperature increases. volume of a gas molecule is negligible when compared to the space that separates it from other gas d. e. 6. A heating curve illustrates The changes in the temperature and physical state of a substance as it is heated. b. a. What happens to the heat applied as the temperature is increased. What happens to the particles of a substance as it is heated. d. c. The chemical changes that occur as the substance is heated. e. What a substance looks like as it is heated. An ionic compound has a solubility of 30 g per 100 mL of water at room temperature. A solution containing 70 g of the compound in 300 mL of water at the same temperature is: 7. b) unsaturated e) colloid o) suspension a) saturated d) supersaturated

Explanation / Answer

5. Which of the following is not a postulate of the kinetic-molecular theory of gas:

Ans: e. Gas molecules will eventually stop colliding due to the energy lost in each collision

6. A heating curve illustrates:

Ans: a. The changes in the temperature and physical state of a substance as it is heated.

7. Given that the solubility is 30 g per 100 mL. So in 300 mL the solubility would be 90 g. Since only 70 g is dissolved in 300 mL, the solution will be unsaturated.

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