17. Ferrous sulfate (FeSO4) is a compound essential to our body. It is used to treat iron deficiency anemia. What are the elements that made up this compound?
a. fluorine, sulfur, and oxygen
c. iron, sulfur, and oxygen ,
b. fluorine, strontium, and oxygen
d. iron, strontium, and oxygen
18. What type of solution contains the maximum amount of solute dissolved by a given amount of solvent?
a. unsaturated solution
b. saturated solution
c. supersaturated solution
d. none of the above
19. What type of solution contains the contains less amount of solute than the maximum amount it can dissolve at a given amount of solvent?
a. unsaturated solution
b. saturated solution
c. supersaturated solution
d. none of the above
20. What type of solution contains the contains greater amount of solute than the maximum amount it can dissolve at a given amount of solvent?
a.unsaturated solution
b. saturated solution
c. supersaturated solution
d. none of the above​