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Chem 301 Exam 2

Spring 2004 March 24, 2004 Name KEY

This exam has 6 questions on 6 pages.

1. (25 pts.) Draw the best Lewis structures for the following species. Show all valence electrons

and formal charges for all atoms. Provide the information requested.

a. SnCl

–

molecular shape trigonal pyramid

hybridization of central atom sp

26e

–

Cl Cl

b. NO

–

molecular shape bent

hybridization of central atom sp

18e

–

c. SeOCl

molecular shape trigonal pyramid

hybridization of central atom sp

26e

–

ClCl

d. ClF

molecular shape T-shape

hybridization of central atom dsp

28e

–

e. PO

3–

molecular shape T

hybridization of central atom sp

32e

–

1 2 3 4 5 6

____________ 2

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Chem 301 Exam 2 Spring 2004 March 24, 2004 Name KEY This exam has 6 questions on 6 pages. 1. (25 pts.) Draw the best Lewis structure

Seite 2 - ____________

22. (8 pts.) Rank in order of increasing bond strength (weakest on the left, strongest on the right). a. N–H P–H As–H As–H < P–H &l

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34. (27 pts.) Follow the steps below to derive the M.O. diagram for SH4. a. (12 pts.) Show the symmetry adapted linear combinations (SALCs) of

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45. (15 pts.) Indicate if the following species are chiral or achiral. CNCla. OH3CHHHb. PHHFc. achiral chiral achiral HOsH3NCNH3H3N

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5Data Pages Periodic Table of the Elements103 Lr (260)102 No (259)101 Md (258)100 Fm (257)99 Es (252)98 Cf (251)97 Bk (247)96 Cm (247)95 Am (243)9

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6D∞hC∞vIhOhTdCsCiCnvS2nCnDnDndDnhCnhC1Linear?yesyesyesyesyesyesyesnonononononoσd?σh ?σv ?S2n ?yesC5?i?Two ormore Cn,n>2?i?StartCn ?i ?Are nC2 ⊥ to

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