Question

Consider a certain reaction A -> Products with k = 2.0 x 10⁻²s⁻¹. Calculate the concentration of A remaining after 100 s if the initial concentration ofA is 1.0 mol L⁻¹.

Answer 1

Answer:

0.135 mol/L

Explanation:

From the units of k it's clear that the given reaction is a first order reaction

So,

ln[A]' = ln[A] - kt

= ln[1.0] - (2.0 × 10^-2)100

= 0 - 2

= -2

A = e^-2

= 0.135 mol/L