A Chemical Reaction of the General Type A $\rightarrow$ 2B Is First-Order, with a Rate Constant of 1

Essay

A chemical reaction of the general type A $\rightarrow$ 2B is first-order, with a rate constant of 1.52 *10¯⁴ s¯¹.
A) Calculate the half-life of A.
B) Assuming the initial concentration of A is 0.067 mol L¯¹, calculate the time needed for the concentration to fall to 0.010 mol L¯¹.