exam 2 chem - DrRuth says: In all cases, select the answer...

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Unformatted text preview: DrRuth says: In all cases, select the answer that BEST answers the question asked. The total points on this exam is 400. Read the whole thing first and plan which to answer first because you feel confident about them. Notice the hardest ones and save them till last so you dont use up all your time working on them. Shear 52375 The table below lists electronegativity val- ues for the first six rows. The bottom row and the lanthanides and actinides list atomic weights. Just ignore them. Dont forget, if you need them, molecular weights are on the periodic table on your scantron. 1 18 1A 8A 1 2 H 2 13 14 15 16 17 He 2.2 2A 3A 4A 5A 6A 7A 3 4 5 6 7 8 9 10 Li Be B C N O F Ne 1.0 1.6 2.0 2.6 3.0 3.4 4.0 11 12 13 14 15 16 17 18 Na Mg Al Si P S Cl Ar 0.9 1.3 3B 4B 5B 6B 7B 8B 1B 2B 1.6 1.9 2.2 2.6 3.2 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 0.8 1.0 1.4 1.5 1.6 1.7 1.6 1.8 1.9 1.9 1.9 1.7 1.8 2.0 2.2 2.6 3.0 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 0.8 1.0 1.2 1.3 1.6 2.2 1.9 2.3 2.2 2.2 1.9 1.7 1.8 2.0 2.1 2.1 2.7 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 0.8 0.9 1.0 1.3 1.5 2.4 1.9 2.2 2.2 2.3 2.5 2.0 2.0 2.3 2.0 2.0 2.2 87 88 89 104 105 106 107 108 109 110 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds (223) (226) (227) (261) (262) (266) (262) (277) (268) ( ) 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 140.1 141.0 144.2 145.0 150.3 152.0 157.2 158.9 162.5 164.9 167.3 168.9 173.0 175.0 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr 232.0 231.0 238.0 (237) (244) (243) (247) (247) (251) (252) (257) (258) (259) (260) Version 163 Exam Two: Shear Shear (52375) 2 This print-out should have 35 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points DrRuth says: When working out the Lewis structure, the way they have named this molecule tells you that each N atom has two H atoms attached to it, and that all three groups of (HNH) are attached to the C atom. Assuming that all atoms obey the octet rule, how many lone pairs of electrons are in any one of the resonance structures of the guanadinium ion C(NH 2 ) + 3 ? 1. 6 2. 2 correct 3. 4 4. 5 5. 1 6. 3 Explanation: The resonant structures are N C N H H H H N H H b b b b + N C N H H H H N H H b b b b + N C N H H H H N H H b b b b + 002 10.0 points How many sigma and pi bonds, respectively, are formed in the molecule Cl 2 CO? Carbon (C) is the central atom and all other atoms are bonded to the carbon atom....
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This note was uploaded on 08/29/2010 for the course CH 52375 taught by Professor Ruth during the Spring '09 term at University of Texas at Austin.

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exam 2 chem - DrRuth says: In all cases, select the answer...

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