Task: Question Answering
Input (English): Question: The equation of speed of a chemical reaction: 
 Options:  <1> It must be determined from kinetic measurements and can not be deduced directly from the stoichiometry of the reaction. <2> Allows the units of s-1 (s = second) to be assigned to the velocity constant. <3> It depends on the total reaction order that, in turn, is obtained from the stoichiometric coefficients of the products. <4> Report in detail about the reaction mechanism. <5> It depends on the experimental conditions of the process.
Output (English): 1