PreMed33

Suppose you are studying coordination compounds of Co(II) with the ligand pyridine (py, C5H5N, molar mass=79.10). You isolate a crystalline compound, and because the only available anions are Cl- and NO3-, you hypothesize that the empirical formula of the...

Chromium plating is done using a dichromate solution. How long would it take to plate 1.0x10-2mm thick onto a car bumper with surface area 0.25m^2 in a 25.0 Amp electrolytic cell? (density of chromium is 7.19g/cm^3)

The following data were obtained when a Ca2+ ion selective electrode was immersed in a series of standard solutions. Ca2+ (M) 3.38E-5 3.38E-3 3.38E-1 E(mV) -74.8 -18.7 37.7 Calculate the concentration of a sample that gave a reading of -22.5 mV

Did that multiple times and the answer is still incorrect. The equation I computed was y=252.346x+(-47.318) I've also tried plugging in -22.5 as y and solved for x and still got .098M which was incorrect

the correct answer is 2.45E-3M but I have no clue how that's possible