Exam_1_Ans_2007 - Printed Last Name:...

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Printed Last Name: |___|___|___|___|___|___|___|___|___|___|___|___| Printed First Name: |___|___|___|___|___|___|___|___|___|___|___|___| CUID # |___|___|___| |___|___| |___|___|___| Seat # |___|___|___| School: |___|Barnard |___|College |___|Engineering |___|General Studies Chemistry 1404.002 Professor Flynn Exam 1 February 15, 2007 INSTRUCTIONS: Be certain you have all Eight (8) pages of this exam and a BUBBLE SHEET On the EXAM cover sheet, fill in your name and CUID number (as indicated above). On the BUBBLE SHEET: 1) On Side 2 of the Bubble Sheet print your first and last name in the box provided. 2) Then fill in your CUID IDENTIFICATION # in the space provided. 3) Using a soft lead pencil, blacken the one response that best answers the question or completes the statement. There is only one correct answer to each question. Any question with more than one answer will not be counted. 4) TAKE THE TIME TO READ EACH QUESTION CAREFULLY. Your score is the total number of correct answers; therefore, it is to your advantage to answer every question. 5) The 25 QUESTIONS are equally weighted. 6) You have 75 MINUTES to complete the exam. UNDER NO CIRCUMSTANCES are you to make marks on the bubble sheet except in the appropriate spaces for marking an answer you believe to be correct. You may write on the exam sheets themselves for the purpose of doing calculations. YOU WILL FIND FREE FORMULAS, PHYSICAL CONSANTS, A PERIODIC TABLE AND SCRATCH SHEETS IN A SEPARATE PACKAGE. Check the front blackboard for TIME REMAINING, LAST-MINUTE CORRECTIONS and ADDITIONAL INFORMATION. WHEN YOU HAVE FINISHED THE EXAM or at the end of the allowed time, return the exam pages and the bubble sheet to the TA in charge at the front of the room. DO NOT FORGET! Print your first and last names in the box provided on the bubble sheet, and on the front page of the Eight (8) pages of this exam. REMEMBER! It is your responsibility to ensure that your bubble sheet and exam pages are properly identified. ALL MUST BE HANDED IN BEFORE YOU LEAVE. 1
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Questions with bold problem numbers are judged to be computationally intensive. 1. A weather balloon filled with helium has a volume of 1.0 × 10 4 Liters at 1.00 atm and 30 ° C. It ascends to an altitude at which the pressure is only 0.60 atm and the temperature is -20 ° C. The balloon stretches so that the pressure inside is equal to the external pressure. The volume of the balloon after ascent is: a) 0.50 × 10 4 Liters b) 0.72 × 10 4 Liters c) 0.83 × 10 4 Liters d) 1.39 × 10 4 Liters e) 2.0 × 10 4 Liters 2. Potassium chlorate decomposes when heated, giving oxygen and potassium chloride: 2KClO 3 (s) 2KCl(s) + 3O 2 (g). A test tube holding 87.6 grams of KClO 3 (MW = 122.54 grams/mole) is heated and the above reaction goes to completion. The volume of O 2 collected at 1.04 atm. and 13.2 ° C is: a) 1.116 Liters b) 10.79 Liters c) 24.2 Liters d) 2454.7 Liters e) 24, 200 Liters
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Exam_1_Ans_2007 - Printed Last Name:...

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