explains the fact that gases are 38. Which assumption(s) in the k molecules move
ID: 695388 • Letter: E
Question
explains the fact that gases are 38. Which assumption(s) in the k molecules move at random with no attractive forces between them b. The velocity of gas molecules is proportional to their with the walls of the container (or with other molecules) are elastic c. Collisions a The molecules that make up a gas are very far apart e. All the above 39. The particles that make up solids are: d. disordered & far apart e. no hard & fast rule a. ordered & close together b. ordered & far apart c. disordered & close together 40. The particles that make up gases are: b. ordered & close together ddisordered & far apart e. no hard & fast rule & far apart c-disordered & close together 41. Which statement is correct conceming colloids & solutions? a. Colloids & solutions have about the same size particles b. Colloids can be clear or milky, solutions are always clear, colloids may settle out but not ons c. Colloids are milky, solutions are clear& neither settle out d. Both colloids & solutions are clear & neither settle out e. Both colloids & solutions are milky & both can settle out 42. Regarding boiling & evaporation, all these statements are true except a Boiling occurs at a specific temperature, the actual temperature being determined by the essure b. Evaporation occurs at any temperature and any atmospheric pressure. It also requires heat. c. Boiling will occur as long as the vapor pressure of the liquid equals the atmospheric pressure. d. Evaporation occurs at any temperature and atmospheric pressure but does not require heat. e Both boiling& evaporation require the same amount of heat. 43. All the following statements about the surface tension of a liquid are true excep... a. It's a result of the unbalanced forces that exist at the surface of a liquid. b. It's a result of molecules escaping from the surface. c. Its magnitude is a function of the strength of the forces between the particles d. Because of this phenomenon, liquids tend to form spheres in order to minimize surface area & therefore the unbalanced nature of this force. e. I's responsible for the meniscus (curvature) we observe when water is placed in a glass tube like a graduated cylinder 4. Regarding your recent Heat of Fusion experiment, what was the key assumption that enabled the calculation of H, the heat of fusion of ice? a. That the ice was exactly 0°C before adding it to the water. b. That the ice was completely dry before adding it to the water c. That all the energy required to melt the ice was provided by the atmosphere. d. That allthe energy required to melt the ice was provided by the warm water that the ice was added to e. That the vapor pressure of the ice was equal to the atmospheric pressure. End of ScantronExplanation / Answer
38.
(d) the molecules that make up a gas are far apart.
39
(a) ordered and close together
40.
(d) disordered and far apart
41.
(c) Colloids are milky, solutions are clear and neither settle out
42.
(b)
43.
(b)
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