For the answer to the question above, I assume that the question is two objects, O1 and O2 have charges +1.0 µC and -1.9 µC, respectively, and a third object, O3,?two objects, O1 and O2 have charges +1.0 µC and -1.9 µC, respectively, and a third object, O3, is electrically neutral.
From Gauss's law:
Flux = ∫c E . dA = q/eo
Since this surface encloses all
charge, we can simplify:
Flux = (q1+q2+q3)/eo
Flux =
( (1*10^-6)+(-1.9*10^-6)+(0) )/(8.85*10^-12) = -101694.92 N·m2/C
