How many mL of 1.50 M aqueous potassium iodide solution must be added to an aqueous solution containing 25.0 mL of 0.500 M aqueous lead (II) nitrate to completely precipitate the lead

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

What is the solubility of substance?

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d