The diagram below shows a boy with his positions above the trampoline Which best describes the energy the boy has at position 3 just before gravity begins to pull him back down?

A)applied
B)Kinetic
C)Mechanical
D)potential

Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10^-3 m and k for the dissociation is 1.86x10^-5. ch3cooh(aq)+h2o(> h3o^+(aq)+ch3coo^-(aq)

How many grams of aluminum will there be in 98g of al2o3?

What determines the average kinetic energy of the particles in a gas? a. the number of collisions b. the number of particles c. the size of the particles d. the temperature