The rate constant for this second–order reaction is 0.570 M-1*s-1 at 300∘C . A⟶products A⟶products How long, in seconds, would it take for the concentration of A to decrease from0.720M to 0.200M ?

The rate constant for this first‑order reaction is 0.480 s−10.480 s−1 at 400 ∘C.400 ∘C.   A⟶products   How long, in seconds, would it take for the concentration of A to decrease from 0.690 M to 0.290 M?

A certain first order reaction has k = 2.51 s-1 .  If the initial concentration of the reactant is 6.50 M, how much will be left after two half lives (in M)? Give your answer to three sig figs

The reaction A(aq) → B(aq) is a reaction of order one with respect to A(aq). Theconcentration of A(aq) after 100.0 s of reaction is 0.477 M. The concentration of A(aq) afteranother 300.0 s (so 400.0 s in total) is 0.277 M. What was the initial concentration ofA(aq)? The temperature is always 25.0◦C