The acid-dissociation constant, ka, for benzoic acid is 6.5 × 10-5. calculate the base-dissociation constant, kb, for the conjugate base of benzoic acid. a. 9.3 × 105 b. 2.5 × 10-6 c. 6.5 × 109 d. 1.5 × 10-10

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays