110Sp09ex2_A - Chemistry 110 Exam II Form A March 2, 2009...

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Chemistry 110 Name _______________________ Exam II Form A Section _______________________ March 2, 2009 Signature _______________________ IMPORTANT : On the scantron (answer sheet), you MUST clearly fill your name , your student number , section number , and test form (white cover = test form A; yellow cover = test form B). Use a #2 pencil. There are 28 questions on this exam. Check that you have done all of the problems and filled in the first 28 bubbles on the scantron. The maximum score on this exam is 28 points. Your score will be reported in percents (max 100%). Exam policy This cover sheet must be signed and handed in with your answer sheet for your exam to count. Calculators with text-programmable memory are not allowed. Relevant data and formulas, including the periodic table, are attached at the end of this exam. Your grade will be based only on what is on the scantron form. The answer key will be posted on the web after the exam (under "Exam Schedule"). Hints As you read the question, underline or circle key words to highlight them for yourself. Avoid errors from "mis-reading" the question. Pay attention to units and magnitudes (decimal places) of numbers obtained from calculations. There is no penalty for guessing.
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CHEMISTRY 110 EXAM 2 MARCH 2, 2009 FORM A --------------------------------------------------------------------------------------------------------------------- 1. What is the molecular geometry for SiH 2 Cl 2 ? A. trigonal planar B. tetrahedral C. trigonal pyramidal D. octahedral E. T-shaped --------------------------------------------------------------------------------------------------------------------- 2. Which one of the following molecules is polar? A. H C C H H H B. H C C H C. H C C H Cl Cl D. H C C Cl H Cl E. Cl C C Cl --------------------------------------------------------------------------------------------------------------------- 3. How many moles of phosphorus are in 1 mole of magnesium phosphate? A. 1 B. 2 C. 3 D. 4 E. 6 ---------------------------------------------------------------------------------------------------------------------
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--------------------------------------------------------------------------------------------------------------------- Please use the molecule shown to the right to answer the following three questions (Questions 4–6). 4. The intermolecular forces that this molecule exhibits in the liquid phase are _______. 1. hydrogen bonding 2. ion-dipole interactions 3. London dispersion forces 4. dipole-dipole interactions A. 3 only B. 1, 2 and 3 only C. 3 and 4 only D. 1 and 3 only E. 1, 3 and 4 only ----------------------------------------------------------------------------- 5. What is the molar mass of the molecule? A. 78 g/mol
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This note was uploaded on 05/24/2009 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Fall '08 term at Pennsylvania State University, University Park.

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110Sp09ex2_A - Chemistry 110 Exam II Form A March 2, 2009...

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