ex1 03 - Chem 1022 2/19/03, Prof. D. Leopold Letter answers...

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1 Letter answers are on the last page Chem 1022 _________________ 2/19/03, Prof. D. Leopold Your Name (Optional) EXAM 1 (100 points) This exam covers material in Silberberg Chapters 13 (Solutions) and 16 (Kinetics). You have 60 minutes to do this exam. You may use one 3"x5" index card of notes. Please remember to use a #2 or softer pencil, and bubble in on the answer sheet: your name ( LAST name first! ) student ID number (please double check that you have bubbled this in correctly) form A, B or C as given on a later page of this exam (but do not open the exam now) sign the reverse side of the bubble sheet. There are 20 multiple choice questions, worth 5 points each. You will not be penalized for incorrect answers, so you should answer every question. Each question is graded 5 or 0; there is no partial credit. If you fill in more than one answer for a given question, no credit will be given. If you change your mind, be sure to completely erase the old answer. You can keep this exam. The bubble sheets will not be returned, but can be checked if requested. If you circle the answers here also, you will be able to figure out your score from the answer key. Answer keys will be posted on the class web page tonight. Grades will be posted on WebCT later this week. Possibly Useful Equations, Conversions and Constants: T f = i K f m T b = i K b m P solvent = X solvent P o solvent P = X solute P o solvent S gas = k H P gas rate = k : [A] t = -kt + [A] o rate = k [A] : ln[A] t = -kt + ln[A] o ln ([A] o /[A] t ) = kt t ½ = 0.693/k rate = k [A] 2 : 1/[A] t = kt + 1/[A] o k = Ae -Ea/RT ln(k 2 /k 1 ) = (-E a /R) ((1/T 2 )- (1/T 1 )) R = 8.314 J/(mol·K) = 0.08206 (atm·L)/(mol·L) 1 atm = 760 torr 0 o C = 273.15 K Water K f = 1.86 ° C/ m K b = 0.51 ° C/ m k H (25 ° C) N 2 in H 2 O: 0.0007 mol/L·atm density water: 1.00 g/mL
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2 Part I. Solutions 1. What is the strongest type of intermolecular force between acetone (CH 3 CCH 3 ) and methanol (CH 3 OH)? A. ion-dipole forces B. dipole-induced dipole forces C. dispersion forces D. hydrogen bonding E. ion-dipole forces 2. Assuming ideal behavior, how many moles of solute particles are present in 3.00 mL of an aqueous, 0.020 M AgNO 3 solution?
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ex1 03 - Chem 1022 2/19/03, Prof. D. Leopold Letter answers...

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