According to the kinetic-molecular theory, which sequence represents the relationship between pressure and volume of an ideal gas? A. more gas particles -> more collisions -> higher pressure
B. smaller volume -> crowded particles -> more collisions -> higher pressure
C. more gas particles -> more kinetic energy -> more volume -> higher pressure
D. smaller volume -> crowded particles -> less collisions -> lower pressure

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

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?