For a Certain Overall Second-Order Reaction with the General Form

Multiple Choice

For a certain overall second-order reaction with the general form aA → products,the initial rate of reaction is 0.50 M·s−1 when the initial concentration of the reactant is 0.27 M.What is the rate constant for this reaction?

A) 0.039 M^-1·s−1
B) 6.9 M^-1·s−1
C) 0.50 M^-1·s−1
D) 0.54 M^-1·s−1
E) 25 M^-1·s−1