OM A hydrochloric acid mist in air at 25C is collected in a gravity settler. Calculate the smallest mist droplet (spherical in shape) collected by the settler. Stokes' law applies; assume the acid concentration is uniform through the inlet cross-section of the unit. Given: Dimensions of gravity settler = 30 ft wide, 20 ft high, 50 ft long Actual volumetric flow rate of acid gas in air = 50 ft3/sec Specific gravity of acid = 1.6 Viscosity of air = 1.243 x 10-5 Ib/ft-sec Density of air = 0.076 lb/ft3 Density of water =62.4 lb = = = */ft3