Ashoreline mussel species has a population density of one organism per square meter. will all mussels be found one meter apart.

No.
This method of stating population density is carried out by counting the number of specimen in a given area and then dividing the number of specimen by that area. This does not mean that each specimen is one meter apart. Some regions may have no specimens for multiple meters while other regions may have multiple specimen in the same meter. The population density gives us an average value.

Some of her  assignments would be creation of drugs. she is a medical chemist after all so she'd need to have the necessary knowledge to make medicine which can later be sold in a pharmacy