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MY Chem Review - emrick(mme276 My Custom Review...

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emrick (mme276) – My Custom Review – Mccord – (52385) 1 This print-out should have 57 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points sp 2 hybrid orbitals have 1. tetrahedral symmetry. 2. trigonal planar symmetry. 3. trigonal bipyramidal symmetry. 4. linear symmetry. 5. trigonal pyramidal symmetry. 002 10.0 points Which of the following would be expected to have the highest first ionization energy? 1. Ar 2. Si 3. Xe 4. Cl 5. Na 003 (part 1 of 3) 10.0 points What is the electronic geometry of IF 4 ? 1. trigonal planar 2. T-shaped 3. tetrahedral 4. trigonal bipyramidal 5. octahedral 004 (part 2 of 3) 10.0 points What is the molecular geometry of IF 4 ? 1. spherical 2. pointy looking 3. square planar 4. tetrahedral 5. linear 005 (part 3 of 3) 10.0 points Is IF 4 non-polar ? 1. Yes, it’s non-polar. 2. Cannot be determined from the struc- ture. 3. No, it’s polar. 006 10.0 points An element E has the electronic configuration [Ne] 3 s 2 3 p 1 . Write the formula of its com- pound with sulfate. 1. E 3 (SO 4 ) 2. E 2 (SO 4 ) 3 3. E 2 (SO 4 ) 4. E 3 (SO 4 ) 2 5. E(SO 4 ) 2 6. E(SO 4 ) 3 007 (part 1 of 4) 10.0 points Draw the Lewis structure for the following hydrocarbon molecule. The carbons are num- bered one to four starting with the far left carbon as one. CH 2 CCHCH 3 What is the molecular shape of carbon 3? 1. square planar 2. trigonal planar 3. bipyramidal
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emrick (mme276) – My Custom Review – Mccord – (52385) 2 4. tetrahedral 5. trigonal pyramidal 6. angular 7. linear 008 (part 2 of 4) 10.0 points What is the hybridization of carbon 4? 1. sp 2 d 2. sp 3 3. sp 4. sp 2 5. sp 4 6. sp 3 d 2 7. sp 3 d 009 (part 3 of 4) 10.0 points What are the bond angles of carbon 2? 1. 180 2. 120 3. 90 , 120 , 180 4. less than 109.5 5. 90 , 180 6. 90 , 120 7. 109.5 010 (part 4 of 4) 10.0 points Carbon 2 has 1. 3 sigma bonds and 1 pi bond. 2. 2 sigma bonds and 1 pi bonds. 3. 4 sigma bonds and no pi bonds. 4. 2 sigma bonds and 2 pi bonds. 5. no sigma bonds and 4 pi bonds. 6. 1 sigma bonds and 3 pi bonds. 011 10.0 points Identify the kinds of intermolecular forces that might arise between molecules of CH 3 OH. 1. None of these 2. hydrogen bonding 3. dipole-dipole 4. London forces, dipole-dipole 5. London forces, dipole-dipole, hydrogen bonding 6. London forces 012 10.0 points What would be the most significant type of intermolecular forces in a liquid sample of fluoroform (CHF 3 )? 1. hydrogen bonding 2. dispersion 3. dipole-dipole 4. covalent 5. ionic 013 10.0 points Why is the heat of vaporization of water much larger than the heat of melting (fusion)? 1. Vaporization is a very exothermic process while melting is endothermic.
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emrick (mme276) – My Custom Review – Mccord – (52385) 3 2. The statement is not true; the heat of melting is actually greater than the heat of vaporization. 3. Liquid water molecules are held close to- gether by hydrogen bonds, but solid water molecules (ice) are held close together by co- valent bonds.
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