Exam 1 (practice) - Name Practice Exam 1 Chemistry 333...

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Name: Practice Exam 1 Chemistry 333 Spring 2012 These are questions taken from previous exams. The questions on the actual exam will be very similar. Questions may also be taken from the homework. This exam is about 1.5 times as long as the one you will have in class.
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Chemistry 333 Practice Exam 1 -2- 1) Draw a valid Lewis Structure for the following structural formulas. Make sure to: a) Show all electrons b) Assign formal charges. c) Give all appropriate atoms an octet. A) [CH 2 NO 2 ] - B) [HNCCl] + 2) For the following structure: C N O H a) What is the hybridization of the nitrogen? ________________ b) What is the hybridization of the carbon? ________________ c) What is the geometry of the nitrogen? d) What orbitals form the C-N single bond (sigma-bond)? _____________ e) What orbitals form the C-N double bond (pi-bond)? _____________
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Chemistry 333 Practice Exam 1 -3- 3) Draw a resonance structure for the following molecules that have full valence shells for all atoms. Use curved arrows to show the movement of electrons on both sides of the double-headed arrow. (Note that lone pairs are not shown. But the formal charges are correct.) A) O C C C H H H H H B) N C C N C C H H H H H H H If possible, draw a resonance structure where all appropriate atoms have an octet or duet.
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