Ammonium chloride is dissolved in water to form a 0.1 M NH4Cl(aq) solution. Determine the number of grams of NH4Cl(s) used to produce
400 milliliters of this solution.

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

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.

What must happen before a body cell can begin mitotic cell division