Which statement about the kinetic energy of the ball is true? a
Kinetic energy is scalar (direction does not matter), and it depends on the ball’s mass and height.
b
Kinetic energy is a vector (direction matters), and it depends on the ball’s mass and speed as it goes down the hill.
c
Kinetic energy is a vector (direction matters), and it depends on the ball’s mass and height.
d
Kinetic energy is a scalar (direction does not matter), and it depends on the ball’s mass and speed as it goes down the hill.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?