(Solved): please help pleaseeee Which Fischer projection represents (2S,3R)-2,3-dibromohexane? O a. O b. O C. ...

Which Fischer projection represents (2S,3R)-2,3-dibromohexane? O a. O b. O C. O d. CH?Br Br-H HT CH3 H+H I Br H CH?CH?CH3 Br -Br CH?CH?CH3 CH3 -H H-Br CH?CH?CH3 CH3 H-Br H- -Br CH?CH?CH3 For the reaction shown below would you expect the change in entropy (AS) for the reaction to be positive, negative or unchanged? + O a. negative O b. unchanged O c. positive Which Fischer projection represents R-2-chloropentane O a. O b. O C. O d. H H?C CH?CH,CH3 CI CH3 H CI -CH?CH?CH3 H?CH,CH2CH3 CH3 CH3 HCH2CH2CH3 CI Pure (+)-menthol has a specific rotation of +50°. A mixture of (+) and (-)-menthol was synthesized and found to have a specific rotation of +25°. What is the percent enantiomeric excess (%EE) of the mixture? O a. 10% O b. 40% O c. 50% O d. 80% O e. 25%