ANSWERS FINAL EXAM 3-21-08 FORM A

ANSWERS FINAL EXAM 3-21-08 FORM A - EXAM FORM A FINAL DRAFT...

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EXAM FORM A FINAL DRAFT 1. The outermost electron in the configuration of an element is assigned quantum number values of n = 2, l = 1, m l = 0, m s = -½. Which of the following lists contains all the elements that could include this electron as the outermost one in their ground state configuration? A. O, F, Ne B. B, C, N C. Ne only D. B, C, N, O, F, Ne E. N, O 2. The electron density distribution in an atomic orbital is shown in the diagram below. Which atomic orbital is this A. 3p x2-y2 B. 3d xy C. 3d z2 D. 3p xy E. 3d x2-y2 3. The electron distribution of one of the hydrogen orbitals is shown below. Which orbital is this? A. 4d B. 2p C. 3d D. 3s E. 4s 4. How many subshells with different energies are filled with electrons in the configuration for the ground state of an Ar atom? A. 1 subshell B. 2 subshells C. 3 subshells D. 4 subshells E. None of the above x y z
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5. The reaction of nitric oxide with hydrogen at 1280°C is: 2 NO( g ) + 2 H 2 ( g ) N 2 ( g ) + 2 H 2 O( g ) Based on the following table of data, what is the rate law for this reaction? A. Rate = k[NO][H 2 ] B. Rate = k[NO][H 2 ] 2 C. Rate = k[NO] 2 [H 2 ] D. Rate = k[NO] E. None of the above 6. The initial concentration of radioactive radon-22 in a sample is 4.0 μ M. In a period of 3.82 days the concentration of radon-22 decreases to a value of 2.0 μ M. What is the value of the rate constant for radioactive decay of radon-22? A. 0.36 day -1 B. 0.18 day -1 C. 3.6 hr -1 D. 1.8 hr -1 E. None of the above 7. Which of the following metals will dissolve when it is submersed in 1.0 M HCl? A. Ag B. Cu C. Pb D. Pt E. None of the above 8. A lithium ion battery is composed of one electrode that is made of graphite, C 6 (s) and a second electrode composed of CoO 2 (s). Which of the following processes takes place when the battery discharges to provide power for a computer? a) Electrons move from the CoO 2 electrode to the C 6 electrode in the external circuit b) Li + moves out of layers of graphite and into layers of CoO 2 c) Co 2+ is oxidized to Co 3+ d) Li + moves out of layers of CoO 2 and into layers of graphite e) None of the above 1.25 ×10 -5
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9. In which of the following circumstances are electrons likely to display particle properties? A. A beam of electrons passes from the anode to the cathode of a cathode ray tube that is one meter in length B. An electron is bonded to a proton in a hydrogen atom C. Electrons move a distance of one nanometer from the probe to a conducting surface in a scanning tunneling microscope D. An electron is bonded to the nucleus of a iron atom E. Electrons are not likely to display particle properties in any of these circumstances 10. The Arrhenius equation is written as The “E a ” term that appears in this equation represents A. The energy required for reactants to reach a transition state that is able to form products in a chemical reaction.
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ANSWERS FINAL EXAM 3-21-08 FORM A - EXAM FORM A FINAL DRAFT...

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