Chem1BExam4F2010Key

Chem1BExam4F2010Key - Chem 1B Name Lab M T(AM) T(PM) Exam 4...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chem 1B Name Lab M T(AM) T(PM) Exam 4 December 1, 2010 Instructions: For all mathematical problems, show your work. Give the basic formula (if there is one), rearrange it if necessary, plug in data with units, round properly to the correct number of significant figures, and place a box around the answer. For essay questions, be complete, but concise. Complete sentences with proper spelling and punctuation are expected. Useful information: R = 0.0083145 kJ mol . K ; 1 F = 96,485 C mol e- = 96,485 J V . mol e- ; 0.0592 V c = 2.9979 × 10 8 m/s, 1 amu = 1.660540 × 10-27 kg 1. (2 pts.) Which of the following is TRUE for an operating voltaic cell? (a) G > 0 ; E = 0 (b) G < 0 ; E < 0 (c) G = 0 ; E > 0 (d) G = 0 ; E = 0 (e) G < 0 ; E > 0 2. (2 pts.) The voltaic cell made up of cobalt and silver has E° cell = 1.08 V. If the standard reduction potential for the silver half-reaction is 0.80 V, what is the standard reduction potential for the cobalt reaction? Co(s) + 2Ag 1+ (aq) → Co 2+ (aq) + 2Ag(s) (a) 0.28 V (b) -0.28 V (c) 1.88 V (d) -1.88 V (e) -0.14 V 3. (2 pts.) Which statement is true. (a) Oxidation occurs at the cathode of a voltaic cell. (b) A primary battery is one that can be recharged. (c) Electrolytic cells utilize electrical energy to drive nonspontaneous redox reactions. (d) A salt bridge provides a path for electrons to move between compartments of a voltaic cell. (e) All statements are true. 4. (2 pts.) Nuclides that have neutron-to-proton ratios that are too low (compared with stable nuclides) are expected to undergo: (a) alpha decay. (b) beta decay. (c) positron decay. (d) electron capture. (e) positron decay or electron capture. 5. (2 pts.) Which of the following characteristics of particles produced by radioactive decay are important for assessing the potential for biological damage to living systems? (a) mass (b) charge (c) penetrating ability (d) kinetic energy (e) All of these....
View Full Document

This note was uploaded on 12/21/2010 for the course CHEM 1B taught by Professor Garyj.decicco during the Fall '10 term at Santa Rosa.

Page1 / 5

Chem1BExam4F2010Key - Chem 1B Name Lab M T(AM) T(PM) Exam 4...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online