The rate of a chemical reaction depends on the concentrations of the reactants. Let's consider the general reaction between A and B : aA+bBcC+dD The dependence of the reaction rate on the concentration of each reactant is given by the equation called the rate law. rate=k[A]m[B]n where k is a proportionality constant called the rate constant. The exponent m determines the reaction order with respect to A, and n determines the reaction order with respect to B. The overall reaction order equals the sum of the exponents ( m+n). For example, if m=2 and n=2 then rate =k[A]2[B]2 and the overall reaction order is 2+2=4. The reaction orders are experimentally determined and usually not related to the reaction stoichiometric coefficients a and b. Consider the formation of nitrogen dioxide and oxygen: NO(g)+O3(g)=NO2(g)+O2(g) The reaction is first order in O3 and second order overall. What is the rate law? View Available Hint(s) rate=k[NO2[O3]2rate=k[NO3O3]2rate=k[O3]rate=k[NO]rate=k[NO3O3]rate=k[NO2[O3]