How many seconds are in an exactly 40-hour work week?

7 days = 1 week 60 seconds = 1 minute.
40 hr 60 min 60 sec = 144,000 s. 
The answer is 144,000 seconds hopes this helps :)

60 minutes = 1 hour   24 hours = 1 day   7 days = 1 week   60 second = 1 minute   40 hours 60 minutes 60 seconds = 144,000 seconds. I hope this helped!

I'm sorry but i'm only grade

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.