the reaction rate constant for a particular second order reaction is 0.47 L/mol sec. If the initial concentration of reactant is. 25 mol/L, how many seconds will it take for the concentration to decrease to. 13 mol/L

7.9 s

Explanation:

Given data

Initial concentration of A ([A]₀) : 0.25 M Final concentration of A ([A]) : 0.13 M Rate constant (k) : 0.47 L/mol. s Time (t) : ?

Let's consider the concentration-time equation for a second-order reaction.

1/[A] = 1/[A]₀ + k. t

1/[A] - 1/[A]₀ = + k. t

t = 1/[A] - 1/[A]₀ / k

t = 1/0.13 M - 1/0.25 M / 0.47 L/mol. s

t = 7.9 s