Exam 1A Answer Key | General Chemistry II | CHEM 113, Exams of Chemistry

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KEY C113, Sec. 1 - Spring 2001 a — EXAM # - A 1. From both the article [ placed on Reserve in Morgan Library and the Chemistry in Action (Chapter 13), all of the following were specifically discussed, except: a) The half-life for 'C- (5.73 x 10° years) is useful for dating ancient artifacts. b) The Environmental Protection Agency (EPA) concluded that genetically engineered foods are generally safe. ¢) The Food and Drug Administration (FDA) concluded that genetically engineered foods cannot be { .» distinguished compositionally from traditional foods. Neer . I La Nearly every normal food now has a genetically engineered alternative marketed in stores. . ~ ©) Consumer concem over genetically modified food has produced a moratorium on these foods in - Europe. 2. Using the data table shown below, calculate the average rate * reaction een 10s and 26 s, B aot * aN time (seconds) | [A] mol/L. wt 0 6.20 OTE -105} 15 0.071 ——2 > 0.050 a) 6x 10° M/s b) 8x 10? Mis d)200 M/s €) 476 Mis 3. Which one of the following is not a valid expression for the rate of the reaction below? 4NH3 + 70) > ANO2 + 6920 - ? p Migs « x Drestiy Toh fer . -3 ro 40 joy = Sel Ms ° fa Lid oe cae oe ft MeN BARE d) 1 _AINH 4” At 4. Which substance in the reaction below either appears or disappears the fastest? ANH; +70, — 4NO, + 6H20 a) NH; t : e) NO; d) HO €) cannot tell from the reaction FO, charger each tims 40, “> Oy deneppcs- == 4 NOL appar tok (tho tf .