Abrine solution of salt flows at a constant rate of 99 l/min into a large tank that initially held 100100 l of brine solution in which was dissolved 0.10.1 kg of salt. the solution inside the tank is kept well stirred and flows out of the tank at the same rate. if the concentration of salt in the brine entering the tank is 0.020.02 kg/l, determine the mass of salt in the tank after t min. when will the concentration of salt in the tank reach 0.010.01 kg/l?

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.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.