How did Roman and Chinese knowledge of one another (or gaps in knowledge) impact trade between the two countries?
Directions: Based on the thesis statements you made in the first four checkpoints, answer
the question above. Make sure to include at least three pieces of cited evidence '5 support
your answer.

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.