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

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

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 121 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 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. 1. zero, three 2. three, one correct 3. two, two 4. three, zero 5. two, one Explanation: The CO double bond consists of one sigma and one pi bond. Sigma bonds also occur between each Cl and C. 002 10.0 points Acetylene (C 2 H 2 ) burns in pure oxygen with a very hot flame. The products of this reaction are carbon dioxide and water. How much oxygen is required to react with 52.0 g of acetylene? 1. 240.0 g 2. 32.0 g 3. 160.0 g correct 4. 52.0 g Explanation: m C 2 H 2 = 52 . 0 g First, we need to write the balanced equa- tion for this reaction. Remembering that oxy- gen is diatomic (O 2 ) and that the formulas for carbon dioxide and water are CO 2 and H 2 O (respectively), the balanced equation would take the form 2 C 2 H 2 + 5 O 2 4 CO 2 + 2 H 2 O The number of grams of oxygen that are required for this reaction can then be deter-...
View Full Document

This note was uploaded on 05/12/2010 for the course CHEM 301 taught by Professor Wandelt during the Spring '08 term at University of Texas at Austin.

Page1 / 11

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

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online