At 25 deg. c, the second-order reaction nocl(g)no(g)+
1/2 cl2(g) is 50% complete after 5.82 hours when the
initialconcentration of nocl is 4.46 mol/l. how long will it
takefor the reaction to be 75% complete?

It will take 17.46 hours for the reaction to be 75% complete.

Explanation:

Half life for second order kinetics is given by:

= half life = 5.82 hour

k = rate constant =?

= initial concentration = 4.46 mol/L

Integrated rate law for second order kinetics is given by:

[a] = concentration left after time t =

It will take 17.46 hours for the reaction to be 75% complete.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying