Two Parallel Square Metal Plates That Are 1 $\vec { E }$

Short Answer

Two parallel square metal plates that are 1.5 cm apart and 22 cm on each side carry equal but opposite charges uniformly spread out over their facing surfaces.How many excess electrons are on the negative surface if the $\vec { E }$ field between the plates has a magnitude of 18,000 N/C? (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²,e = 1.6 × 10^-19C)