Chapter 6 assume that after washing your hands, you leave ten bacterial cells on a new bar of soap. you then decide to do a plate count of the soap after it was left in the soap dish for 24 hours. you dilute 1 g of the soap 1: 10^6and plate it on the heterotrophic plate count agar. after 24 hours of incubation, there are 168 colonies. how many bacteria were on the soap? how did you get there?

Ithink the answer you are looking for is (b).

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.