homework 9 fall2007 - CHEM 1015 Homework#9 Posted Due...

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CHEM 1015 Homework #9 Posted: October 12, 2007 Due: Thursday, October 18, 2007 Choose the BEST response to each of the following multiple choice questions and fill in the corresponding space on your orange opscan. 1. The temperature at which a liquid boils is the boiling point of the liquid. The boiling point is an indication of the intermolecular forces that hold the matter in the liquid state. Water boils at 100°C, ethanol (CH 3 CH 2 OH) at 78°C, and ammonia at -33°C. Choose the ranking that best ranks these intermolecular forces in these substances from strongest to weakest. 1. water > ammonia > ethanol 2. ammonia > ethanol > water 3. ethanol > water > ammonia 4. water > ethanol > ammonia 2. Uranium can form the following compounds: 1. uranium dioxide 2. uranium hexafluoride 3. uranium tetrachloride 4. uranium trichloride 5. uranium trioxide. Which of the above has an octahedral shape? 3. Based on general predictions from the periodic table, not from the results of a google search, the compound uranium oxide should have which formula? 1. U 2 O 2. UO 2 3. U 2 O 2 4. UO 4. Based on your answer to question 3, the compound uranium oxide should have which shape? 1. bent 2. pyramidal 3. linear 4. triangular 5. tetrahedral 6. octahedral 7. trigonal bipyramidal 8. a slightly distorted version of an ideal shape listed here 5.
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