142A_Exam2B_key_080511

142A_Exam2B_key_080511 - Chem 142 VERSION B Summer 2011...

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Chem 142 VERSION B Summer 2011 EXAM 1 VERSION B Page 1 of 11 CHEM 142 - Exam 2 Version B !!! DO NOT OPEN THIS EXAM BOOK UNTIL TOLD TO DO SO BY THE INSTRUCTOR !!! Instructor: Dr. Kari Pederson NO GRAPHING CALCULATORS ALLOWED Date: Friday, August 5 ONLY CALCULATORS MAY BE USED AS CALCULATORS (you may not use your cellular phone as a calculator) Time: 9:40-10:40am NO HEADPHONES ALLOWED (EARPLUGS ARE OK) Location: BAG 154 NO HATS WITH BRIMS ALLOWED !!! PLEASE READ THIS !!! Indicate all of the following on your scantron form or five points will be deducted from your exam score: First Name, Last Name, Student Number, Section, Exam Version YOUR FULL NAME: _______________________ ________________________ first name last name YOUR SECTION/SEAT: ________________________ ________________________ discussion section seat number
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Chem 142 VERSION B Summer 2011 EXAM 1 VERSION B Page 2 of 11 Question Points Possible Score 1-8 24 9-16 40 17-24 16 25 20 Scantron Info? -5 TOTAL 100
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Chem 142 VERSION B Summer 2011 EXAM 1 VERSION B Page 3 of 11 MULTIPLE CHOICE: CONCEPTS. 8 @ 3 pts each 24 POINTS TOTAL Please mark the one correct answer for each of the following questions on your scantron. 1. Which of the following statements is(are) true? Oxidation and reduction I. cannot occur independently of each other. II. result in a change in the oxidation states of the species involved. III. describe the loss and gain of electron(s), respectively. IV. accompany all chemical changes. A) I only B) II only C) III only D) IV only E) I, II, and III 2. In which of the following compounds does sulfur have the most positive oxidation state? A) SO S: +2 B) SF 6 S: +6 C) MgSO 3 S: +4 D) H 2 S S: -2 E) SO 2 S: +4 3. A rigid container contains 10.0 g of neon gas. With the temperature kept constant, 10.0 g of argon gas is added. What happens? A) The pressure in the container doubles. B) The pressure in the container increases by less than a factor of 2. C) The pressure in the container increases by more than a factor of 2. D) The pressure stays the same size, but the volume increases. E) The pressure decreases by a factor of 2. P ! n 10.0g Ar fewer moles than 10.0g Ne means total number of moles will increase by less than a factor of two, therefore total pressure will increase by less than a factor of two.
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Chem 142 VERSION B Summer 2011 EXAM 1 VERSION B Page 4 of 11 4. Which of the following statements is true concerning ideal gases?
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This note was uploaded on 01/19/2012 for the course CHEM 142A taught by Professor Campbell during the Summer '11 term at University of Washington.

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142A_Exam2B_key_080511 - Chem 142 VERSION B Summer 2011...

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