Part 1. Draw the chair conformations for cis-1,4-dimethylcyclohexane and trans-1,4-dimethylcyclohexane.( There should be 2 chair structures provided per cyclohexane ring). Note: You do not need to attempt to draw these structures on Canvas. Drawings of each chair conformation will need to provided in the work sent to Dr. Metz Part 2. Rank the chair conformation stability, 1 being the most stable and 4 being the least stable conformation, if there is a tie state which conformations are of equal stability. (Answers to this question will need to be provided with the structures sent to Dr. Metz after the exam) Part 3. Which isomer of 1,4-dimethylcyclohexane, cis or trans, is associated with the most stable conformation? (Answers to this question needs to be provided in the space below in order to receive credit)

a. Refer to Question 5b – Which solvent, polar protic or polar aprotic, would you expect to be used to facilitate the reaction outlined in question 5b? (Answers to these questions must be provided in the space below in order to receive credit) b. Which reaction intermediate outlined in your mechanism for 5b does this choice of solvent help stabilize? (Answers to these questions must be provided in the space below in order to receive credit)

Designate each alkene as either the (cis or trans) OR (E or Z) isomer. (Answers to this question needs to be provided in the space below in order to receive credit) a.   b.

Determine if the following chemical bonds would be classified as polar covalent, nonpolar covalent, or ionic. If the bond is polar covalent identify the atoms with partial negative or partial positive charges. (Final answers to this question must be included in the space below to receive credit) a. C—H  b. C—N  c. Cl—Cl d. C—O 

Convert the following Lewis structures to bond-line structures.  Work for this answer needs to be provided completed on your scratch paper and sent in the work sent to Dr. Metz after the exam is completed.   Lewis Structure A. B. D.     D. E.    

Part 1. Identify the major organic product for the following chemical reaction. Ensure that appropriate stereochemistry is displayed when applicable.. (Answer to this must be submitted with the work scanned and sent to Dr. Metz after the exam) Part 2. Which mechanism, SN2, SN1, E1, or E2, does this reaction proceed through? (Answers to these questions must be provided in the space below in order to receive credit – this question must be answered to receive credit Part 1)

Review the compounds below.  Gingerol gives fresh ginger pungency. Zingerone lends gingerbread its sweet, spicy flavor; this compound is not present in uncooked ginger but is created by the reaction of gingerol when its heated. Question: Identify all 4 unique functional groups present between zingerone and gingerol. (Answers to this question must be included below in order to receive credit)    

Provide the condensed electron configuration for the following atoms. (Final answers to this question must be included in the space below to receive credit) a. Hg b. Sn2+

Refer to the following balanced combustion reaction between methane, CH4, and oxygen to produce carbon dioxide and water. (Final answers to each question must be included in the space below to receive credit)  CH4 (g) + 2 O2 (g) CO2 (g) + 2 H2O (l) If 30.0 g of methane (CH4) reacts with 115.0 g of oxygen gas (O2) which is the limiting reagent? (Molar mass of methane: 16.0 g/mole and molar mass of O2 : 32.0 g/mol) Work for this answer needs to be completed on your scratch paper and sent in the work sent to Dr. Metz after the exam is finished.

Select TRUE after you’ve worked the following problems on your own piece of paper. Remember that you’re also being scored at the end of the exams for neatness of work.Use the Laplace transform method to solve the given initial value problem for y(0)=1 and y'(0)=-1.y”+y=sint