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Unformatted text preview: Chemistry 1A Exam II 10/13/06 Professor Garza Directions: Please be sure to show all work in your calculations. Partial credit will only be given if there is something to evaluate. Please write all of your final answers in the space provided. You may use your calculator. Scratch paper and periodic table are provided. Please do not turn in your scratch paper. Last Name_________________________First Name______________________ MI____ Chemistry 1A Lab Section (circle one) M Tu W Th Fr Lecture Section (circle one) Section I Section III Problem Number Possible Points Your Score 1 19 2 40 3 30 4 36 5 20 6 30 Total 175 Points Helpful information: N = 6.022 x 10 23 mol –1 1 1 (19 P TS .) Give oxidation states for the indicated atom in the following molecules or ions: 4 2 2 O S K S _______ +3 4 4 ] ) ( [- CN Fe Fe _______ +0- 2 6 4 O S S _______ +5/2 or +2 1/2 2 2 O Na O _______ -1 ( 29 4 2 4 HPO NH P_______ +5 2 2 Cl Hg Hg _______ +1 2 (40 P TS .) a) Draw the Lewis structure for the following compounds, and indicate the formal charges and the electronic and molecular shapes of the molecule predicted by VSEPR. If more than one molecular shape is theoretically possible, which is preferred and why?: - 3 I- 3 NO Lewis structure drawing with formal charges: Electronic Geometry: trigonal bipyramid Possible Molecular Geometries: bent or linear....
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This note was uploaded on 04/07/2008 for the course CHEM 1A taught by Professor Garza during the Fall '07 term at Claremont.
- Fall '07