The ocean is in steady state with respect to A. This means that the oceanic inventory of A remains constant with time, and that A is introduced into the ocean at the same rate at which it is removed from the ocean.

Using symbols only(no numbers), I need help re-stating these conditions using mathematical expression(s). Thank you!

X Concentration of A in seawater =[A]sw = 573.2 mmol/kg Average concentration of A in river water =[A]rw = 0.231 mmol/kg Mass of the ocean =M= 1.38 x 1021 kg Global river flow rate = Q = 3.50 x 1013 m3/yr Global input rate of A into the ocean = JA,in mol/yr Global removal rate of A out of ocean = JA,out mol/yr Density of river water = 1.00 g/mL = 103 kg/m3 = = =