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Midterm 1-2010 keys - NAME STUDENT ID NUMBER LAB TIME TA...

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NAME: STUDENT ID NUMBER LAB TIME TA NAME CHEMISTRY 112A First Midterm February 1, 2010 1 --------------------- (6) 2--------------------- (10) 3-------------------- (4) 4--------------------- (10) 5 --------------------- (10) 6 -------------------- (10) 7-------------------- (6) 8-------------------- (10) 9-------------------- (4) 10-------------------- (12) 11-------------------- (8) 12-------------------- (10) Bonus ---------------- (5) Total -------------------(100)
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1) a) Draw the Kekule structure of CO 2 . What is the hybridization of carbon in this compound? b) The atomic number of silicon (Si) is 14. Draw the Kekule structure of SiO 2 . O C O sp-hybridized O Si O 2) Assign the formal charges to the atoms of molecule A, B and C. What is the relatioship between A and B ? What is the relationship between B and C? N N C H H N N C H H N N C H H A C B A and B are two resonance forms B and C are two resonance forms
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3) What is the relationship between D and E? Br Cl Br Cl D E D and E are isomers 4) Name compound the following compound and draw its skeletal structure. Identify the tertiary and quaternary carbons. H 3 C CH 2 C CH 3 CH 3 CH 2 CH CH 3 H 2 C CH 3 3,3,5-trimethylheptane quaternary tertiary
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1 2 3 4 5 6 carbon number hybridization number of H 1 2 3 4 5 6 5) a) Indicate the hybridization of all the carbon atoms of the following molecule.
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