Aside from carbon and hydrogen, which are always present in organic molecules, what are some other substances they may contain?

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

What is the maximum number of electrons that an atomic orbital can contain?