How many grams of solid nickel will be plated if an aqueous nickel(II) sulfate solution is electroplated over 10.5 min with a constant current of 3.20 A

613 mg

Explanation:

Number of fargday's  

Here, I = 9.20 A

        t = 10.5 min

          = 10.5 x 60 seconds

So,

 = 0.0208 F

Here, 2e, 2F

2F = 1 mol of Ni

1 mol = 59 gm of Ni

0.0104 mol = 59 x0.0104 gm Ni

                    = 0.613 gm Ni

                    = (0.613 x 1000 ) mg of Ni

                    = 613 mg of Ni

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: