Consider a reaction that occurs by the following mechanism: A + BC rightarrow B slow AC + D rightarrow A + CD Above, place a circle around the intermediate and place a square around the catalyst. Put a star next to the step that is rate determining. Place a circle around the appropriate letter choice below about how best to complete this sentence: At equilibrium. the concentrations of the reactants and products are constant the chemical reaction is over the concentration of the reactants and products are equal the rates of the forward and reverse reactions are equal the rate constants of the forward and reverse reactions are equal a and d a and b Place a circle around the appropriate "true" or "false" designation for each statement below. All collisions of molecules result in a chemical reaction. The rate of a reaction is affected by the temperature of a reaction. A catalyst speeds up the forward reaction only. -R/E_a is the slope of the line of a graph that is In k vs. 1/T