The rate constant for this first‑order reaction is0.870 s−1 at 400 ∘c. a⟶products how long, in seconds, would it take for the concentration of a to decrease from 0.830 m to 0.260 m?

Time required is 1.33 seconds

Explanation:

For first order reaction, the rate law expression is:

Where

A0 = initial concentration = 0.830 M

At = concentration after time t = 0.260 M

t = time in seconds = ?

k = rate constant = 0.870 s⁻¹

time =

time =

2b2t

explanation:

2b2t