Question

two copper balls each of mass 6.35g are kept at separation of 10 cm in air if one electron from every 10^10 atoms is transferred

Answer 1

Hello Dear.

Question is little bit incomplete. As I understood, it must be asking to find the Number of Electrons transferred and the Charge developed on each Copper Balls.

Here is the answer ⇒


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Mass of Each Copper Balls = 6.35 grams.
Molecular Mass = 63.5 g/mole.

Using the Formula,

No. of Moles = Mass/Molecular Mass
                     = 6.35/63.5
                     = 0.1 moles.

∵ 1 moles is equal to 6.022 × 10²³ atoms
∴ 0.1 moles is equals to 6.022 × 10²³ × 0.1 atoms
∴ 0.1 moles is equals to 6.022 × 10²² atoms


Now, As per as the Question, Each atom transfers the one electrons from one copper balls to other copper balls.

Thus, Number of Electrons Transferred = 6.022 × 10²² × 1 electrons.


Hence, the Number of Electrons Transferred from one copper ball to other copper ball is 6.022 × 10²² Electrons.

For Charge ⇒ 

Using the Formula,

 Charge on Each Piece = Number of Electrons Transfer × Charge on one Electrons.

Charge on one electron = 1.6 × 10⁻¹⁹ C

Thus, Charge on Each piece = 6.022 × 10²² × 1.6 × 10⁻¹⁹
                                               = 6.022 × 1.6 × 10³
                                               = 9.6352 × 10³
                                               = 9635.2 C.

Thus, Charge on each Piece of Copper is 9635.2 C.


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Hope it helps.

Have a Good Day.  :-)

Answer 2

Mass of Each Copper Balls = 6.35 grams.

Molecular Mass = 63.5 g/mole.

Using the Formula,

No. of Moles = Mass/Molecular Mass

                     = 6.35/63.5

                     = 0.1 moles.

∵ 1 moles is equal to 6.022 × 10²³ atoms

∴ 0.1 moles is equals to 6.022 × 10²³ × 0.1 atoms

∴ 0.1 moles is equals to 6.022 × 10²² atoms

Now, As per as the Question, Each atom transfers the one electrons from one copper balls to other copper balls.

Thus, Number of Electrons Transferred = 6.022 × 10²² × 1 electrons.

Hence, the Number of Electrons Transferred from one copper ball to other copper ball is 6.022 × 10²² Electrons.

For Charge ⇒ 

Using the Formula,

 Charge on Each Piece = Number of Electrons Transfer × Charge on one Electrons.

Charge on one electron = 1.6 × 10⁻¹⁹ C

Thus, Charge on Each piece = 6.022 × 10²² × 1.6 × 10⁻¹⁹

                                               = 6.022 × 1.6 × 10³

                                               = 9.6352 × 10³

                                               = 9635.2 C.

Thus, Charge on each Piece of Copper is 9635.2 C.

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Hope it helps.