Answer: The overall order of a reaction is the sum of the exponents of the concentrations of the reactants in the rate law.
Given the rate law R = K[(CH3)3 CBr] [H₂0]⁰, we can see that the reactant [(CH3)3 CBr] has an exponent of 1 and the reactant [H₂0] has an exponent of 0. To find the overall order of the reactants, we add the exponents:
1 + 0 = 1
Therefore, the overall order of the reactants in this reaction is 1.