118.8cm2 surface of the copper cathode of a voltameter is to be coated with 10-6m thick copper of density 9 x 103kgm-3. How long will the process run with 10A constant current?
[3.3 x 10-7kgC-1]

olisawhite

9 years ago

Why didn't you convert 118.8cm-3 to m-3? If you do that,you will get a different answer.

Realboygram1andonly

6 years ago

You forgot to the 10 A current

ICEDOK

3 years ago

My school, you did not convert the cm2 to m2 before multiplying with the m, when you do this you final answer will be 54 mins and not 5.4 mins

Jonbellion

1 year ago

aren't they supposed to change the cm to m

MERCYOLADEPO

1 year ago

how did 10^-6*10^3 = 10^-7 ???
you also didnt include the 10A in your solutions

MaraeX

9 years ago

please the explanation given is not clear..and seems incorrect

PHOBIA999

2 years ago

your conversion of 118.8cm² is supposed to be 118.8 cm X cm which is equivalent to 10^-2m X 10^-2m which will be 10^-4, so in your solvings above you mistakenly put 10^-6

s.samuel

3 years ago

How did 10¯6 ×10³
Become 10¯7

Cause I don't understand was happening here