How would water be used in a chemical experiment that requires the dilution of hydrochloric acid? How would you test the solubility of different solutes, and what type of factors affect the solubility?

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.