A button case for a small battery must be silver plated. The button is a perfect cylinder with a radius of 3.0 mm and a height of 2.0 mm. For simplicity, assume that the silver solution used for plating is silver nitrate. (Industrial processes often use other solutions.) Assume that the silver plating is perfectly uniform and is carried out for 3.0 min at a current of 1.5 a. 

(a) What mass of silver is plated on the part? 

(b) How many atoms of silver have plated on the part?

(c) Calculate an estimate of the thickness (in atoms) of the silver coating. (Silver has a density of 10.49 g/cm³ and an atomic radius of 160 pm.)