The rate law for the reaction2NOBr(g)>2NO(g)+Br2(8)at some temperature isRate△[NOBt=K[NOBr]2△ta.If the half-life for this reaction is 2.00 s when [NOBrlo0.900 M,calculate the value of k for this reaction.b.How much time is required for the concentration of NOBr todecrease to 0.100 M?