Please help hard chem prob?

Question

How many seconds does it take to deposit 1.89 g Ni on a decorative drawer handle when 10.4 A is passed through a Ni(NO3)2 solution?

Answer 1

Ni2+ + 2e- ===> Ni

So there are 2 gram-eq. wts in 1 gram-mol. wt.

Atomic weight: Ni=58.7

1.89gNi x 1molNi/58.7gNi x 2eqNi/1molNi x 96,500coul/1eqNi = 6214 coulombs

1 amp = 1 coulomb/sec

6214/10.4amp = 598 sec to three significant figures

Answer 2

I took a sort load very corresponding to yours in Junior 3 hundred and sixty 5 days, and am taking AP international historic previous, AP Eng Lit & Comp, AP Calc AB, AP Stats, AP laptop technology A, and that i took college Physics I and II over the summer season. this is hella uncomplicated, do no longer even problem approximately it. once you're certainly one of those certainly proficient pupils, this is positive. I also have a 102 GPA, so do no longer problem on the subject of the GPA ingredient. while you're good in school, excel in what you're good at.

Answer 3

depends who's doing it......