Rile of a reaction, t1/2. is the time ft tokes for A cortain first-oder resction (A -producte) has a rate consfant of 4.80101, at as C: How many minutes does at taka ctart concontration [A] to decroase by haif arpid, aller one haildife the concentration Express your answer with the appropriate units. en the irkikal concemtation A]0 to A/A/2, A/p/8, and to on on Part B A certain second-order reacton (H) pproducts) has a rate constant of 1,10103MF1s1 uf 27 F C and an hatat hataate of 254 is. What ia the cencenterafon of the resetart B affor on halkife? Express yeur answer with the appropriate units