an object with a surface area of 10.7 cm210.7 cm2 is to be plated with nickel. a current of 8.31 a8.31 a is applied to a solution containing nickel in the 2 2 oxidation state. calculate the time required to coat the object with an even layer of nickel that is 2.09×10−3 cm2.09×10−3 cm thick. the density of nickel is 8.91 g/cm3.