Why were peasants able to afford to move to places where they received better treatment during the black death? question 16 options: because so many people had been killed in the plague, labor was at a premium. ideas about the class system were starting to change. there was a new king who allowed peasants more freedom.

More people being killed resulting in more jobs for strong working peasants 

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.