chem101Exam_242_PartialKEY

chem101Exam_242_PartialKEY - Chemistry 101 Exam#1 Fall 2007...

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1 Chemistry 101 Fall 2007 Exam #1 VERSION B October 10, 2007 Name: (Printed) _______________________________________________ Score Questions 1-15________________/30 Question 16__________________/10 Question 17__________________/15 Question 18__________________/15 Question 19__________________/10 Question 20__________________/10 Question 21__________________/10 Total______________________/100 Instructions: Do not open this exam until instructed to do so. (1) Write your name and signature on the line provided above (2) Answer questions 1 – 15 by circling the correct answer (3) Answer the remaining questions in the space provided (4) When instructed to do so, check to ensure that your exam has 11 pages, including this one. A periodic table and reference sheet has been included as the last page of this exam.
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2 Part I – Multiple Choice: Circle the answer that best describes the answer to each question. (30 points total, 2 points each) (1) Which of the following is FALSE according to Dalton s Atomic Theory? (a) All atoms of chlorine have identical properties that distinguish them from other elements. (b) Atoms combine in simple whole number ratios to form compounds. (c) One carbon atom will combine with one oxygen atom to form a molecule of carbon monoxide. (d) Atoms of sodium do not change into another element during a chemical reaction with chlorine (e) An atom of nitrogen can be broken down into smaller particles that will still have the unique properties of nitrogen. (2) Write the formula for Barium Nitrite (a) B(NO 2 ) 3 (b) BaNO 3 (c) BN (d) Ba(NO 2 ) 2 (e) Ba 3 N 2 (3) Determine the empirical formula of a compound that contains 36.86% N and 63.14 % O by mass. (a) N 2 O 3 (b) NO (c) N 2 O (d) NO 2 (e) NO 3 (4) What element has 20 protons, 20 neutrons and 20 electrons? (a) Potassium
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chem101Exam_242_PartialKEY - Chemistry 101 Exam#1 Fall 2007...

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