PracticeFinal2003

PracticeFinal2003 - Final Exam 1. Chem 1C 2003 (6 pts) For...

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Final Exam Chem 1C 2003 1 1. (6 pts) For each of the following molecules, draw the Lewis structure, indicate the molecular geometry and give the hybridization of the phosphorous atom in each of the molecules. L e w i s S t r u c t u r e (include lone pairs ) Molecular Geometry Hybridization on phosphorous PCl 2 PO 3 2. (24 pts) Circle the formula (only one) that best fits each of the following descriptions: a) solid at 25 o C and 1 atm O P N F none of these b) stronger acid (first ionization) HNO 3 H 3 PO 4 H 2 SO 4 c) highest boiling point CH 3 OH CH 3 CH 3 H 2 O CH 3 OCH 3 d) most ionic in character BaCl 2 MgCl 2 BeCl 2 e) highest boiling point SiH 4 CH 4 SnH 4 f) highest boiling point NH 3 H 2 O N 2 H 4 g) has one π -bond CO O 3 N 2 CO 2 none of these h) has cis and trans isomers 2-methyl-2-butene 2-chloro-2-butene 2-mehtyl-1-butene i) forms strong π -bonds F H Si C j) stronger bond O 2 S 2 k) higher boiling point HCl NaCl l) does not have an optical isomer Cysteine Glycine Alanine
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Final Exam Chem 1C 2003 2 3. a) (5 pts) Draw the Lewis structure for methyl isocyanate, CH 3 NCO, including resonance structures. Assign the formal charges on the carbon, nitrogen and oxygen atoms for each of the resonance structures. The order of the atoms in the formula gives the skeletal structure. b) (2 pts) Which of the resonance structures is the most stable. c)
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This note was uploaded on 03/14/2010 for the course CHEM 109A 109A taught by Professor Aue during the Spring '09 term at UCSB.

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PracticeFinal2003 - Final Exam 1. Chem 1C 2003 (6 pts) For...

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