Which of the following is not soluble in water?
a. potassium sulfide
b. iron (ii) bromide
c. iron (iii) hydroxide
d. iron (iii) nitrate
e. ammonium sulfate

The isotonic saline solution described in part a is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops. based on this information, what can be said about these two solutions?

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 happened to the amount of carbon dioxide in the atmosphere from 2010–2017?