The graph shows that the reaction is at equilibrium after 60. seconds because the concentrations of both no2(g) and n2o4(g) are

(1) increasing
(2) decreasing
(3) constant
(4) zero

I think the reason why the reaction is at equilibrium after 60 seconds is because the concentration of both NO2 and N2O4 are : Constant, which means that they do not undergone any change

hope this helps

Answer charle's law