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D Question 34 1 pts Consider the reaction represented by the equation 25O2(g) + O2(8) 2503(g). For the system at chemical equilibrium, which of the following explains what happens after the addition of oxygen gas (assume constant temperature)? The amount of SO3(e) decreases and the value for K increases. The amount of SO3(e) stays the same and the value for K decreases. none of these The amount of SO3(g) decreases and the value for K stays the same. The amount of SO3(g) increases and the value for K stays the same.

Question 33 1 pts Which statement best represents LeChatelier's Principle? none of these A system in equilibrium will respond to a change by moving in the direction that reduces the change as it returns to equilibrium. A system in equilibrium will always remain in equilibrium. A system in equilibrium will not be affected by a change in concentration. O When a change is made to a system in equilibrium, equilibrium can never be restored.

Question 19 1 pts of the following questions, which ones are thermodynamic rather than kinetic concepts? 1. Can substances react when they are put together? II. If a reaction occurs, how fast will it occur? III. What is the mechanism by which the reaction occurs? IV. If substances react, what energy changes are associated with the reaction? O I and III II and IV O II and III O I, III, and IV O I and IV