A Second-Order Reaction Starts with an Initial Concentration of 0 $\times$

Multiple Choice

A second-order reaction starts with an initial concentration of 0.100 mol/L of the reactant.If the rate constant is 1.4 $\times$ 10^-2 L/mol·s,what is the time required to decrease the initial concentration to 0.050 mol/L?
2A $\to$ B $~~~~~~~~$ rate = k[A]²

A) 710 s
B) 1100 s
C) 49.5 s
D) 3.57 s
E) 2100 s