HW9 - Owlia Arria Homework 9 Due Nov 6 2007 midnight Inst...

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Owlia, Arria – Homework 9 – Due: Nov 6 2007, midnight – Inst: Vandenbout 1 This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. Room Assignments for EXAM 2 A-K WEL 1.316 L-O WEL 2.122 P-Z WEL 1.308 001 (part 1 of 1) 10 points Identify the kinds of intermolecular forces that might arise between molecules of trans - CHCl CHCl. 1. London forces 2. London forces, dipole-dipole, hydrogen bonding 3. None of these 4. hydrogen bonding 5. dipole-dipole 6. London forces, dipole-dipole 002 (part 1 of 2) 10 points Calculate the ratio of the potential energies for the interaction of a water molecule with an Al 3+ ion (of radius 53 pm) and with a Be 2+ ion (of radius 27 pm). 1. 0.63 2. 0 . 39 3. 0.24 4. 0.76 5. 0.52 6. None of these 003 (part 2 of 2) 10 points Which ion will attract a water molecule more strongly? 1. Be 2+ 2. Al 3+ 3. Equal attraction 004 (part 1 of 1) 10 points Which of the following cations is likely to be hydrated in compounds? 1. Li + 2. K + 3. NH + 4 4. Rb + 5. Cs + 005 (part 1 of 1) 10 points Which of the following compounds is UN- LIKELY to be commonly available and thus not found in the laboratory? 1. KCN · 2H 2 O 2. La(NO 3 ) 3 · 6HO 3. CuSO 4 · 5H 2 O 4. BaCl 2 · 2H 2 O 5. Na 2 CO 3 · 10H 2 O 006 (part 1 of 1) 10 points What would be the most significant type of intermolecular forces in a liquid sample of fluoroform (CHF 3 )?
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