If the time elapsed is 4.26 min, what is the value of the rate constant, k?

ln[R]t / [R]o = -0.0237

I am not sure how to slove this. Is Rt 4.26 min?

To find the value of the rate constant, k, you need additional information. The equation you provided, ln[R]t / [R]o = -0.0237, represents the natural logarithm of the concentration ratio [R]t/[R]o, where [R]t is the concentration of a reactant at time t and [R]o is the initial concentration at time t=0.

While knowing the time elapsed, 4.26 minutes, is helpful, it does not provide enough information to directly determine the rate constant, k. However, if you have additional data, such as the initial and final concentrations of the reactant, you can use the provided equation to solve for k.

Could you please provide the values for the initial concentration [R]o and the concentration [R]t at time t? With this information, I can help you find the value of the rate constant, k.