Chem 1C Hayton Practice Exam 1-2

Chem 1C Hayton Practice Exam 1-2 - 9 Give the structure of...

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CLAS Chem 1C Practice Exam 1 1. Draw the Lewis structure (including resonance) for the following molecules: a. SO 2 b. PCl 4 + 2. Predict the geometry of the above molecules. 3. Which molecule has a dipole moment (is polar)? a. BCl 3 b. SF 6 c. SF 4 4. Draw three different resonance structures for the N 2 O molecule (N is central atom). Predict which is the most stable. 5. If oxygen were the central atom in N 2 O, how would the polarity differ from the molecule above? 6. Predict the hybridization on the central atoms in the following molecules: a. N 3 - b. ClF 3 c. ICl 5 7. Give the molecular orbital diagram for the NF molecule (use the MO diagram for F). What is the bond order? Is it paramagnetic or diamagnetic? 8. Which has the strongest bond, NF, NF + or NF - ? Longest bond?
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Unformatted text preview: 9. Give the structure of SCl 6 using the theory of hyperconjugation. 10. Give the hybridization of each atom in CO 2 and the number of sigma and pi bonds. How many p-orbitals are used for pi-bonding? 11. Arrange the following in order of increasing boiling point: a. PCl 3 , Ar, NH 3 b. FeBr 2 , CH 3 OH, H 2 Se 12. Identify the type of crystalline solid formed by each: a. Si b. CHF 3 c. NH 4 I d. Na 13. In which type of unit cell are there 2 atoms per cell? 14. Put the 3 types of unit cells (simple cubic, body centered cubic and face centered cubic) in order of increasing available space occupied. 15. Which would be an example of a p-type semiconductor? a. As doped with Po b. Ge doped with In c. Si doped with As...
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