177Exam1KeyS07

177Exam1KeyS07 - SEAT NO DR JOE BURNETT SPRING 2007 THIS...

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SEAT NO.__________ DR. JOE BURNETT SPRING 2007 THIS EXAM CONSISTS OF 13 QUESTIONS ON 7 PAGES CHEM 177 EXAM I FEBRUARY 5, 2007 NAME______________________ RECIT. INSTR.______________ RECIT. SECT._______________ GRADING Teaching Assistants and Recitation Sections PAGE POINTS SCORE Name Sections Time 2 3 4 5 6 TOTAL 14 pts 16 pts 21 pts 17 pts 33 pts 101 pts ________ ________ ________ ________ ________ Alex Blom Jason Briski Susan Lorge Timothy Mauldin Kristopher McKee 3, 5 2, 6 7, 8 4, 9 10, 11 9:00, 10:00 8:00, 11:00 11:00, 12:10 9:00, 12:10 1:10, 2:10 QUESTIONS ARE WRITTEN ON BOTH SIDES OF EACH PAGE. THERE IS A PERIODIC TABLE ON THE LAST PAGE. YOU MAY REMOVE THIS PAGE FOR SCRATCH PAPER. THE ANSWER KEY TO THIS EXAM WILL BE POSTED ON BULLETIN BOARD #5 IN THE HALLWAY EAST OF ROOM 1002 GILMAN AND ON THE CHEM 177 WEBSITE. SHOW ALL WORK. ANSWERS SHOULD INCLUDE APPROPRIATE UNITS AND CONTAIN THE CORRECT NUMBER OF SIGNIFICANT FIGURES. Answer Key
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2 1. (4 pts) A pure substance A is heated in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has the same properties as the single product formed from combustion of carbon in oxygen. Which one of the following statements is unequivocally true ? A. Substance A is a compound. B. Substance B is a homogeneous element. C. Gas C is a homogeneous mixture. D. All of the statements are true. 2. (4 pts) Two solid spheres have the same mass. Sphere A is larger than sphere B. Which one of the following statements is true? A. The density of sphere A is the same as that of sphere B. B. The density of sphere A is less than the density of sphere B.
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177Exam1KeyS07 - SEAT NO DR JOE BURNETT SPRING 2007 THIS...

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