Q2. Answer any TWO of the following parts: (a) Draw the two main conformations that exist for cyclohexane. Explain clearly why one conformer is more stable than the other. Using cis-1-ethyl-3-methylcyclohexane, as an example, explain how ring flipping occurs. Draw both conformers of cis-1-ethyl-3-methylcyclohexane and explain clearly which one predominates. (b) What is polarimetry? The specific rotation of (R)-carvone is - 61°. A chemist prepared a 750 mg mixture of (R)-carvone and its enantiomer in 10 ml of ethanol and placed the solution in a 10 cm polarimeter cell. The observed rotation was -4.125° Calculate the specific rotation for the above mixture. What is meant by enantiomeric excess? Then determine the % enantiomeric excess (% ee) in the mixture. (i) (ii) (iii) What % of the mixture is (R)-carvone and (S)-carvone?

Q2. Answer any TWO of the following parts: (a) Draw the two main conformations that exist for cyclohexane. Explain clearly why one conformer is more stable than the other. Using cis-1-ethyl-3-methylcyclohexane, as an example, explain how ring flipping occurs. Draw both conformers of cis-1-ethyl-3-methylcyclohexane and explain clearly which one predominates. (b) What is polarimetry? The specific rotation of (R)-carvone is - 61°. A chemist prepared a 750 mg mixture of (R)-carvone and its enantiomer in 10 ml of ethanol and placed the solution in a 10 cm polarimeter cell. The observed rotation was -4.125° Calculate the specific rotation for the above mixture. What is meant by enantiomeric excess? Then determine the % enantiomeric excess (% ee) in the mixture. (i) (ii) (iii) What % of the mixture is (R)-carvone and (S)-carvone?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Content Google Do google slid X Dr. Ortiz a ☑ Certificate ☑ > Course EX Cengage L ☑ OWLv2 | O ✓ Search res ChatGPT ✓ + C prod03-cnow-owl.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator-assignment-take New Chrome available : E4 CH 16 17 and 18 [References] Question 1 1 pt Question 2 2 pts "Heater Meals" are food packages that contain their own heat source. Just pour water into the heater unit, wait a few minutes, and voilà! You have a hot meal. Mg(s) + 2 H2O(l) → Mg(OH) 2 (s) + H2(g) Question 3 1 pt Species AH° (kJ/mol) S° (J/mol·K) AƒG° (kJ/mol) Question 4 2 pts Mg(s) 0 32.67 0 Question 5 1 pt Question 6 × 2 pts H2O(l) Mg(OH)2(s) -285.83 69.95 -237.15 -924.54 63.18 -833.51 H2(g) 0 130.7 0 Question 7 1 pt Question 8 2 pts Question 9 1 pt HEATER MEALS Question 10 2 pts Question 11 1 pt Question 12 1 pt Question 13 Charles D. Winters INCLUDES 34 ou b HEATER MEALS 1 pt Question 14 1 pt The heat for the heater unit is produced by the reaction of magne- sium with water.…
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help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working
session.masteringchemistry.com/myct/itemView?assignment ProblemID=190556628&offset=next Discussion Question 1: Chapter 6 Homework blem 6.20- Enhanced - with Feedback Enter the symbols for the ions and the correct formula for the onic compound formed by each of the following. esc Q A N F1 2 W S F2 X #3 20 E D F3 с S4 $ OOO 000 R Part E F4 F Enter the symbols for the ions of sodium and phosphorus. Enter the lons formed by these elements and separate your answers with a comma (e.g., Sr²+, As³-). cation, anion = Part F Complete previous part(s) Submit Part G cation, anion Submit Part H Complete previous part(s) 65° V Enter the symbols for the ions of calcium and sulfur. Enter the lons formed by these elements and separate your answers with a comma % Request Answer T Request Answer G 6 ΑΣΦ B ΑΣΦ MacBook Air F6 Y H 18⁰ h & 7 N F7 U * CO 8 J BUT RAS poddany ▶II ? F8 1 ? E 9 K F9 O L (e.g., Sr²+, As³-). 0 Ga3+ and 02-E L F10 P F11
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