The rate constant for this first‑order reaction is 0.740 s − 1 0.740 s−1 at 400 ∘ c. 400 ∘c. a ⟶ products a⟶products how long, in seconds, would it take for the concentration of a a to decrease from 0.790 m 0.790 m to 0.230 m? 0.230 m?

1.668 S

Step-by-step explanation:

We are given that

Product

For first order reaction,

Rate constant=k=

Temperature=

We have to find the time taken by the reaction when concentration of A to decrease from 0.790 M to 0.230 M.

Substitute the values then we get

Hence, it would take 1.668 s for the concentration of  A to decrease from 0.790 M to 0.230 M.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

idk

step-by-step explanation: