While studying a strain of infectious bacteria, scientists find that a certain chemical stops the bacteria from multiplying. They develop a drug that contains the chemical. Before releasing the drug for widespread use, which of the following should the scientists do to learn more about how the drug works? A. use a computer model to predict the action of the drug B. observe the drug's effects on the bacteria with a microscope C. study how the drug affects people in an experimental trial D. all of these

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.

26. of of (aq) by (aq) is . if 50.00 ml of 1.05 m is to 25.00 ml of 1.86 m ,at be? ( no is toina of aof) , h.. (p. ). . .

Place the elements below in order of decreasing ionization energy. aluminum(al) chlorine(cl) magnesium (mg) sulfur(s)