The chromium d = 7.10 g/cm3 plated on a 9.75-cm2 surface was dissolved with HCL and diluted to 100.00mL. A 25.00-mL aliquot was buffered to pH 5 and 50.00mL of 0.00862 M EDTA was added. Titration of the surplus chelating reagent required 7.36mL of 0.01044 M Zn2+. Compute the average thickness of the chromium plating.