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STUDY OBJECTIVES. 1  Write mole ratios relating the amounts of reactants and products in a chemical reaction. 2  Calculate the mass of a substance that is produced or consumed in a chemical reaction, given the mass of any other species involved in the reaction.
where A and B are reactants, A-B is the activated complex, and C and D are the products. For a chemical reaction to occur, the reactant molecules should collide. Collisions between molecules are facilitated by an increase in the concentration of reactant, an increase in temperature, or the presence of a catalyst.