Consider the reaction alatex: \longrightarrow ⟶ products. the rate law for this reaction is rate = k[a]2 where k=2.90 latex: \times × 10-2 m-1s-1 at a particular temperature. if the initial [a] = 0.0500 m, what is the value of the half-life?
478 s
34.5 s
690. s
23.9 s

690 s

Explanation: Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

For a reaction:

k= rate constant=

x = 2= order with respect to A

For a second order reaction,

= half life = time taken for a reaction to complete to half.  

=initial concentration= 0.0500 M

Thus

∠gdh and ∠edh on edg.

answer is c