Similar to alum, ferric chloride (FeCl3) is commonly used as a coagulant and flocculent in water treatment plants. When FeCl3 is placed in water, it forms Fe(OH)3 solids which helps remove small suspended particles. A 250,000 ppm concentration of FeCl3 is added to the raw water in the rapid mix basin at a flowrate of 5 GPM (gallons per minute). The flowrate of water to be treated is 20 MGD. What mass of Fe(OH)3(s) is generated each day (in kilograms/day)

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.

Adilute aqueous potassium nitrate solution is

Consider the story you just read. all but one of the choices below indicate that something is living.