Algal blooms which pollute streams, rivers, and lakes are caused by the presence of O A. lead. O B. oxygen. C. mercury. D. phosphates. O E. E. DDT.

Asolution is made by dissolving 25.5 grams of glucose (c6h12o6) in 398 grams of water. what is the freezing point depression of the solvent if the freezing point constant is -1.86 °c/m? show all of the work needed to solve this problem.

Rays from the sun are not considered matter true or false

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures