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Gel Electrophoresis

How much posi...

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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

H_{2} O

Q. How many molecules of water are present in a

0.25 m o l e

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 \times 10^{23}

molecules of water is 18 g.

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