Question

How much positive and negative charge is there in a cup of water

Answer 1

Suppose the cup contains 250cc of water.

Mass of 250cm^3 of water=250g
Molecular weight of water=18g
No.of molecules in 18 g of water=6.023*10^23
No.of molecules in 250g of water=6.023*10^23*250
______________
18

As each molecule of water contains 10 electrons,therefore,total no.of electrons

n= 10*6.023*10^23*250
_________________
18
=8.365*10^25
As q=ne
q=8.365*10^25*1.6*10^-19 c
=1.338*10^7 c

Answer 2

That was heroic Elsa tony !

Answer 3

I wrote in the 2 steps all divided by 18.OK..

Answer 4

What do u mean Damon???

Answer 5

I mean I often answer physics questions here and you saved me a lot of work :)

Answer 6

Fine I understood..anyway thank u...:)))

Answer 7

How much of positive and negative charges are present in a cup of water? Assume the mass of water in the cup to be 250 g.