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Exam 1 CH101 Fall 2008 Form A v2

# Exam 1 CH101 Fall 2008 Form A v2 - Name ID Section CH 101...

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Name ______________________________ ID#_______________________ Section # ________ CH 101 EXAM 1 Fall 2008 - Form A Fill in your name, ID#, and section on this test booklet. Fill in and bubble in your name, ID#, and section on the scantron form. For question #60 mark A. Mark the best answer after reading all possible choices. Use a #2 pencil and make clean erasures to insure proper scoring. When finished, turn in your scantron sheet and show this booklet and your CUID to the proctor. Good Luck! 1. What is the sum of the coefficients when the following equation is balanced using the lowest whole numbered coefficients? ___B 2 O 3 (s) + ___HF (l) ___BF 3 (g) + ___H 2 O (l) A. 8 B. 10 C. 12 D. 15 2. What is the position of the right end of the grey bar pictured below? A. 8 m D. 7.96 m B. 8.0 m E. 7.960 m C. 7.9 m 3. Millikan’s oil drop experiment demonstrated that… 4. Which species has 22 protons, 26 neutrons and 20 electrons? 5. Consider the reaction: 3C (s) + O 2 (g) C 3 O 2 (g) 12.0 moles of C (s) react in excess of O 2 (g) . If 3.0 moles of C 3 O 2 (g) are collected at the end, what was the % yield of this reaction?

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