複選題
A. How many unpaired electrons are in the following complex ions? The atomic number for Ru, Ni, and V is 44, 28, and 23, respectively. en stands for ethylene diamine. Account for your answer. (6%)
(A) Ru(NH₃)₆²⁺ (low spin case)
(B)Ni(H₂O)₆²⁺
(C) V(en)₃³⁺

B. For the reaction, O2(g) + 2NO(g) → 2NO2(g), the observed rate law isRate = k[NO]2[O2]Which of the changes list below would affect the value of the rate constant k? Account for your answer. (6%) (A)increasing the partial pressure of oxygen gas. (B)changing the temperature.(C) using an appropriate catalyst.

A. The following plot shows a vapor pressure of various solutions of components A and B at some temperature.  Which of the following statements is false concerning solutions of A and B? If it is false, correct it. (6%) (A)The solutions exhibit negative deviations from Raoult's law. (B)ΔHsoln for the solutions should be endothermic. (C)The intermolecular forces are weaker in solution than in either pure A or pure B. (D) Pure liquid B is more volatile than pure liquid A.(E)The solution with x = 0.6 will have a lower boiling point than either pure A or pure B.

複選題7. You have 2.4 moles of gas contained in a 4.0-L bulb at a temperature of 32 °C. This bulb is connected to a 20.0-L sealed, initially evacuated bulb via a valve. Assume the temperature remains constant. Please answer the followings. (10%) (A) What should happen to the gas when you open the valve? Calculate any changes of the conditions. (B) Calculate ΔH, ΔH, q, and w for the process you describe in part a. (C)Given your answer to part b, what is the driving force for the process?

複選題9. You have a concentration cell with Cu electrodes and [Cu2+] = 1.00 M (right side) and 1.0 x 10-4 M (left side). Please answer the followings. (10%) (A) Draw this concentration cell labeling the anode and the cathode, and describing the direction of the electron flow.(B)Calculate the potential for this cell at 25 °C.(C)What will happen (increase or decrease) to the cell potential after enough NH3 is added to the left cell compartment. Account for your answer.

複選題10. Consider the following graph of binding energy per nucleon as a function of mass number. The graph is shown in the next page. Please answer the following questions. (6%) (Please refer to the image provided in the original document) (A)What does this graph tell us about the relative half-lives of the nuclides? Explain your answer.(B)Which nuclide shown is the most thermodynamically stable? Which is the least thermodynamically stable?(C)What does this graph tell us about which nuclides undergo fusion and which undergo fission to become more stable? Support your answer.

35. Radiocarbon dating is based on which decay process? (A). (B). (C). (D). All of the above (E). None of the above

34. In the Lewis acid-base model, acids are ______ and bases are ______ (A). donors, acceptors (B). donors, acceptors (C). electron pair donors, electron pair acceptors (D). donors, donors (E). electron pair acceptors, electron pair donors

33. Which of the following complexes shows geometric isomerism? (A). K[Co(H2O)2Cl4] (B). [Co(H2O)5Cl]Cl2 (C). [Co(H2O)5Cl]SO4 (D). Na3[CoCl6] (E). [Co(H2O)6]Cl3

32. Acetone (mw = 58.08, =232 mmHg) and butanone (mw = 72.11, =100 mmHg) have the indicated molar masses and vapor pressures. A container holds 1.00 kg of butanone. How much acetone must be added to the butanone to elevate the total vapor pressure over the mixture to 125 mmHg at 25°C? (A). 5.313 kg (B). 290 g (C). 188 g (D). More information needed (E). None of the above

31. A solution contains 1 mol of liquid A and 3 mol of liquid B. The vapor pressure of this solution is 314 torr at 25°C. At 25°C, the vapor pressure of liquid A is 265 torr and the vapor pressure of liquid B is 355 torr. Which of the following is true? (A) This solution exhibits a positive deviation from Raoult's law. (B) This solution is ideal. (C) This solution exhibits a negative deviation from Raoult's law. (D) None of these statements is incorrect.

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