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exam1key - CHEM 331, Fall 2005 1st Midterm Exam ANSWER KEY...

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CHEM 331, Fall 2005 1st Midterm Exam Ian R. Gould PRINTED NAME 1. Be sure your exam has 9 numbered questions and one extra credit question on 6 total pages 3. Read the directions for each problem CAREFULLY. 4. Write CLEARLY. Illegible answers will be considered to be incorrect. 5. Molecular models are allowed. 6. Do not use red ink. 7. Don't cheat, use common sense. 3 / 20 5 / 20 7 / 20 Total / 175 + 5 2. Use any blank pages as scratch paper. They will not be graded. 6 / 25 4 / 15 2 / 15 first last ASU ID Name of Person on your LEFT (or write Empty or Aisle) 1 / 10 H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn RIGHT 8 / 30 Extra Credit / 5 9 / 20 dipole resonance 1 nomenclature line angle hybrid/angles resonance 2 electron energies Lewis structures M.O.s ANSWER KEY
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- 2 - NAME Question 1. (10 pts). Indicate the direction of the MOLECULAR dipole moment in the following molecules using the usual notation. CHEMISTRY 331, Fall 2005, MIDTERM #1 N Br F Question 2 (15pts.) Give the IUPAC name for the following compound. Question 3 (20pts.) a) For the structure shown, draw ONE more resonance structure and show how they are related using the curved arrow-pushing formalism. Do not forget formal charges and non-bonding electrons as appropriate. b) Indicate the major resonance structure, give a BRIEF one sentance explanation for your choice. H C H O H + there are TWO acceptable correct 5pt. answers, shown in red, the one that tilts to the left would be correct if this were the only resonance structure + the molecular dipole "tilts" towards the C-F bond since this has the larger bond dipole moment 5pts 5pts 5pts 2pts 3pts + 1pt 3pts bond dipole moments only, maximum 2 pts. each some effort, but wrong, maximum 1 pt each
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exam1key - CHEM 331, Fall 2005 1st Midterm Exam ANSWER KEY...

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