14C_s11_lec02_e02

14C_s11_lec02_e02 - Chemistry 14C Lecture 2 Spring 2011...

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Chemistry 14C Lecture 2 Spring 2011 Exam 2 Page 1 Page 1 score = Chinese researchers have been studying cigarette butts, one of the most ubiquitous forms of pollution on the planet. (It has been estimated that 4.5 x 10 9 butts are discarded annually.) Extracting butts with water produces a solution that has up to 95% efficiency in preventing corrosion of steel. Nicotine and DHAQ are two of many compounds in this protective solution. N N CH 3 O O OH HO Nicotine C 10 H 14 N 2 DHAQ C 14 H 8 O 4 1. (6) Consider the mass spectrum of DHAQ, then write a number in each blank. (a) M has m/z = ___________ (an integer). (b) When M is 100%, the relative intensity of the M+1 peak is ___________ % (one decimal place). (c) When M is 100%, the relative intensity of the M+2 peak is ___________ % (an integer). 2. (2) Define: Base peak 3. (4) Another component in the extract has these peaks in its mass spectrum: m/z = 162 (M; 100%), m/z = 163 (11.88%), and m/z = 164 (0.06%). (a) Can this component be nicotine (circle one)? Yes No Cannot determine (b) If you circled 'no' or 'cannot determine', briefly explain your answers using no more than fifteen words . 4. (6) Using the scale shown below, sketch the IR spectrum of DHAQ. Label each peak with the corresponding bond and name of functional group (i.e., alkyl C–H). Neatness and accuracy count. Be specific . Hint: Practice on the back of the spectroscopy data table pages before sketching your final answer here
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Chemistry 14C Lecture 2 Spring 2011 Exam 2 Page 2 Page 2 score = 5. (2) The white, fluffy material in cigarette butts is cellulose acetate, a modified form of cellulose. This material can be recycled if clean, further reducing the magnitude of butt pollution. The IR spectrum for a sample
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14C_s11_lec02_e02 - Chemistry 14C Lecture 2 Spring 2011...

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