115 Final Exam Spring 2006

115 Final Exam Spring 2006 - Name _ Section _ TA _...

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Name _________________________ Chemistry 115 Section ____________ FINAL EXAM Total Points = 200 TA ___________________________ Thursday, 7:00 PM M a y 4 , 2 0 0 6 Directions: 1. Each student is responsible for following directions. Read this page carefully. 2. Write your name and other requested information on this page and on the separate answer sheet. 3. CODE your name on the answer sheet using an ordinary (#2) pencil. 4. CODE your correct 10-digit identification number (PUID) on the answer sheet. THIS IS VERY IMPORTANT! 5. CODE your section number on the answer sheet. Please use all four digits, 0101, 0102, 0201, etc. This is also very important! 6. Put all calculations on the examination pages. DO NOT PUT ANY EXTRA MARKS ON THE COMPUTER ANSWER SHEET! 7. This exam consists of 40 multiple-choice questions worth 5 points each. Choose the one best or correct answer for each question and write it both on your exam paper and on the computer answer sheet. The computer answer sheet is the only one that will be graded! 8. This exam consists of 10 pages plus a Periodic Table. Please check to be sure that you have them all! Useful information: R = 0.08206 L•atm / mol•K Avogadro’s number = 6.022 x 10 23 Density = mass / volume = MW x n/V END OF EXAM 1) Please make sure that you have entered 40 answers on your scan sheet. 2) Make sure that you have entered your name, 10 digit PUID number, and lab section number (4 digits). 3) You MUST turn the scan sheet in to your TA before leaving the exam!
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Final Exam – 5/04/06 2 D____ 1. The following steps are important in constructing a scientific theory: 1) Formulate hypothesis 2) Make observations 3) Develop Scientific Theory 4) Test Hypothesis In which order would you follow the above steps to construct your theory? (a) 1, 2, 3, 4 (b) 2, 3, 1, 4 (c) 3, 2, 4, 1 (d) 2, 1, 4, 3 D____ 2. A certain compound was found to contain 67.6% C, 22.5% O, and 9.9% H. If the molecular weight of the compound was found to be approximately 142 g/mol, what is the correct molecular formula for the compound? (a) C 5 H 2 O 5 (b) C 6 H 6 O 4 (c) C 7 H 10 O 3 (d) C 8 H 14 O 2 (e) C 4 H 7 O D____ 3. 25.6 g Ba(OH) 2 are dissolved in 250.0 ml of H 2 O. What is the molarity of the OH ions in the solution? (a) 0.149 M (b) 0.299 M (c) 0.598 M (d) 1.20 M (e) 2.39 M E____ 4. How many electrons, protons and neutrons does 27 Al +3 have? (a)
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This test prep was uploaded on 04/02/2008 for the course CHEM 115 taught by Professor L during the Spring '02 term at Purdue University.

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115 Final Exam Spring 2006 - Name _ Section _ TA _...

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