153A_Exam1_S10 - Chemistry and Biochemistry 153A Spring...

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Page 1 of 7 Chemistry and Biochemistry 153A Spring 2010 Exam 1 Instructions: s You will have 1 hour 45 minutes to complete the exam. s You may use a pencil (recommended) or blue or black ink pen to write your answers. Other color inks will not be graded. Your choice of writing utensil will not affect your ability to request a regrade. s Only answers on the answer sheet, in the indicated space, will be graded; writing anywhere else will be ignored. Be sure to write your name on the answer sheet. s Do not write in the score boxes on your answer sheet; you will be docked points if you do. s For answers with a word or sentence limit, words beyond this limit will not be read or graded. s For short- or multi-answer questions, including irrelevant or wrong information or selections in your answer will cause you to lose points. s Write legibly. If the grader cannot read your answer, you won’t get credit. s Items you may have on your desk: - non-programmable scientific calculator, without its case or cover - writing utensil(s) - student ID ALL other items must be placed into a bag, which must be zipped up or closed and pushed completely under your chair. s No hats, hoods, earphones, or cellphones are allowed. s If you continue to write after ‘time’ is called, your exam will be taken and docked 10 points. s Questions are printed on both sides, as is the answer sheet. Be sure you’ve answered all of the questions!
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Page 2 of 7 1. (2) True or false? Hydrogen bonding is what causes ice to be less dense than liquid water. 2. (2) True or false? Water has a high dielectric constant because it has a dipole moment. 3. (3) A buffered solution (choose all answers that apply): a. Has a pH close to 7. b. Resists changes in pH. c. Contains an acid and a base. d. Has a zero average charge. e. Has a pKa close to 7. 4. (7) Given the following dipeptide: a. List all atoms contained within one peptide plane. b.
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This note was uploaded on 08/26/2011 for the course CHEM 153A taught by Professor Staff during the Spring '05 term at UCLA.

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153A_Exam1_S10 - Chemistry and Biochemistry 153A Spring...

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