fischer projections/isomers/enantiomers/stereocenters - For 2,3-butanediol, there are 3 isomers; 2 are enantiomers, one is not. Use Fischer projections and draw all three. Identify stereocenters and identify them as enantiomers and the meso compound.
Glucose - 2. Turn the -OH on carbon 5 around so it is close to the aldehyde carbon (carbon #1).
3. Form the hemi-acetal using the carbon #5 -OH and the carbonyl at carbon 1.
a. As you make the hemi-acetal, ...