Final answer:
The total reaction order of the reaction A + B → C, where the rate is determined by the concentrations of both reactants squared (rate = kA²B²), is 4.
Step-by-step explanation:
The total reaction order of the reaction A + B → C, where the rate is determined by the concentrations of both reactants squared (rate = kA²B²), is 4 (A).
The rate law of the reaction shows that both reactants A and B are squared, indicating that the reaction is second order with respect to both A and B. Therefore, the total reaction order is the sum of the individual reaction orders, which is 2 + 2 = 4.