2008_05_30_14_50_18

2008_05_30_14_50_18 - its Chemistry 6C UCSD @fi Spring...

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Unformatted text preview: its Chemistry 6C UCSD @fi Spring 200? Exam II 100 points The .mms mam»! ahmm iq the. nerson taking this exam. Kequn'eu: Note: Ifyou fail to follow the instructions listed below you may lose up to It) points! Any form of cheating, including talking during the exam will warrant immediate administratix-‘e action. Instructions 1) Fill in C on your seantron as your test fonn. 1) Fill in your name and Student ID# on everv page of this exam as well as your scantron. 2) Have A=i for your Student 1115.5 when you bubble it in on you scantron.\ 3) Mark every bubble fully, there is not a penalty for guessing! (eenie, meenie, ...J 4) Work out every problem on this exam. 5) ll‘you haven’t finished within the last 5 minutes remain seated and gum until all exams have been collected. Draw the Lewis dot structure for each of the following molecules (ifpossible). (3pts each) Next to each formula give the name of the main shape of each compound. (2pts each) State the Oxidation Number of the central atom for each species. (1 pts each) H I: I ‘- IFZ' shape Oxidation # + l lie-CI)“1 Shape Aft-lat L0 Ami Oxidation #_-t_?_ 7"XQ pl :0: 1mmm4hmihagui Oxidation # W, 1'1 ‘. \ w t”- "_— ,/ \ it ll:- NC] Shape TF'Ifiv/trtl Euqummrnlql 5 —_____ Oxidation gig-— Shape—8M Oxidation # Jr 1 *‘ 91 "w _., Oxidation #L _1‘ if. f l‘ Place the above compounds in order of increasing acidity: (4pts total) Ng<hy<wa14th<Hflm Name:_ Date: a (I 15‘ l. Bombarding “Fe with a neutron results in emission of a proton and formation of A) “Co. 3 F I O S? B 55F. ‘l 1L n 6 541;“ 2L- ‘LO 9 1.? * 2r’m" D) 49'1': E) 54Cr 2. In the 238U decay series, there are eight a particles and six [3 particles lost starting with 0t emission fiom 238U. What is the final product? A zospb 47‘ B) 207% 2"? ~—7 8q°L ’L O “’71” ) cu 1 —l 32, C) ziopo u) L G» zospb ‘ E) 2103i 3. The role of magnesium in chlorophyll is A) an oxidizing agent. B) to react with water to produce hydrogen. C a hydrogenation catalyst. (Dfi to keep the ring rigid. E) a reducing agent. 4. When “'1 emits a [3 particle, what nuclide is produced? A) 13"Te 13! i o B) “We '39: '7 4i; * g4 Y’L C) 1301 J @ isixe E) 1275b 5. Sulfur does not react directly with A) fluorine. B) fluorine and chlorine. C) chlorine and bromine. (F3) iodine. E) chlorine. Page 1 7. 8. 9. 10. 11. Which of the following is a basic oxide? A) C0203) B) SOz(g) C) (30(2) D) Si02(s) G) M306) Which of the following is expected to be the best oxidizing agent? A) CNaq) 1‘ B) V02+ C TP+(aq) 3 * ' Cu*(aq) ( E) Cr042‘(aq) - 1’ Which of the following is diamagnetic? A) 02' B 02 ) 022' N02 Which of the following is most likely to undergo ct decay? ® 232111 B) "C C) 3H D) "K E) 24Na The half-life of strontium-90 is 28.1 years. Calculate the percent of a strontium sample left after 100 years. A) 82% QM: bi c .DLS‘ @ 8.5% k. C) 0.34% .01 “A D) 63% 7 g) 6‘102 E) 76% V'm The atomic radii of the Period 6 d—metals are A) large because of the lanthanide contraction. @ smaller than expected, and about the says the Period 5 d-metals. about the same as the lanthanides. ' D) larger than the atomic radii of the Period 5 d—metals. / E) about the same as the Period 4 d-metals. N Page 2 l2. Lithium and sodium bum in air to produce V _” é? Li02(s) and Na202(s). — L\ r N 0\ i OZ 7 Lb0(s) and Na902(s). C) Li202(s) and Na02(s). h Ll 1 O m "‘ Z O D) Li02(s) and Nm0(s). — NA ()1 E) Lilo“) and Na20(s). 2 13. All of the following can act as Lewis acids except ('3); K20. B) NO. C) C02. D) 303. E) N02. 14. Which of the following has the largest atomic radius? A) Ga B) Ge C) Al @ln 15. When an a particle is emitted, the mass number A) increases by 4. B) decreases by l. C increases by 2. decreases by 4. E) decreases by 2. 16. All of the following react with water to form hydrogen and a hydroxide except A) Ca. B Mg. Be. D) Na. E) K. 17. gich of the following noble gases is least likely to react with fluorine? Ne 'B’)’ Xe C) Ar D) Rn ~E)- Kr Page 3 18. Which of the following pairs of elements have similar polarizability? Be and Al B Li and Na C) B and Alr’ D) Be and Mg v E) Mg and B 19. Which of the substances below can be used to extinguish a magnesium fine? @ All of the substances listed react with burning magnesium. water C) sand D) carbon dioxide E) nitrogen 20. The nuclear equation for the disintegration of U-238 produces Th-234. What other nuclide is produced? A) B 13? _. 2%" f ‘l B) positron “Q- 7 “[0 L‘ ’v Z L @ “He D) neutron E) 3He 21 . Which of the following has the smallest polarizability? A S (35 ca» C) 82' D) Cl 22. The alkali metals all react with water. Which is the most reactive metal? A) Na B) K C) Li Q Cs E) Rb 23. Order the following acids from weakest to strongest: HClO, HClOa, HCIOz, and HClOs. A) HCIO4 < HCIO < HC102 < HClOs B) HClOa < HClOs < HCIOz < HClO C) HClO < HClOa < HCIO4 < HClOz (Q) HClO < HCIOz < HClO; < 11004 E) HCIO < HClO4 < HClOs < HClOz Page 4 All-11,5 6‘3) 1 (D A C O 24. The metalloproteins hemoglobin and vitamin B12 contain the metals A) iron and Mo, respectively. B) iron and zinc, respectively. manganese and iron, respectively. iron and cobalt, respectively. B) cobalt and nickel, respectively. Page 5 ...
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This note was uploaded on 10/17/2010 for the course MAT Math10C taught by Professor Operadragos during the Spring '09 term at UCSD.

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2008_05_30_14_50_18 - its Chemistry 6C UCSD @fi Spring...

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