1. What is true at chemical equilibrium? the forward reaction rate is equal to the reverse reaction rate 2. A sample of a substance burns more rapidly in pure oxygen than in air. Which factor is most responsible for this high rate of reaction? the concentration of the reactants 3. What statements accurately describe kinetic molecular theory? Select all that apply. The mobility of particles is dependent on their kinetic energy. Matter is made up of particles. 4. What does Le Châtelier's pr...