How many atoms are in this formula?
5(NH4)2 O

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

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.

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from