What is the correct definition of pH?

how basic a solution is

the concentration of potassium ions in solution

how acidic a solution is

the concentration of hydrogen ions in solution

The chemical effect of the endocrine system is longer lasting than the chemical effect of the nervous system. select the best answer from the choices provided t f

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

The particles that are found in the nucleus of an atom are