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Byju's Answer
Standard IX
Biology
Gel Electrophoresis
How much posi...
Question
How much positive charge present in molecules of H2o Define emf of a cell
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Q.
How much positive and negative charges are present in a cup of water?
Q.
Define the emf of a cell in terms of the work done in moving a charge through the cell. Using Joule's law obtain the equation,
e
m
f
=
I
(
R
+
r
)
.
Q.
How many molecules are present in
10
g
of
H
2
O
?
Q.
How many molecules of water are present in a
0.25
m
o
l
e
of
H
2
O
?
Q.
How much positive and negative charge is there in a cup of water ?
Take mass of 1 cup of water as 250 g. Mass of
6.02
×
10
23
molecules of water is 18 g.
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