Question

An object of mass 1 kg contains 4 × 10^20 atoms. If one electron is removed for every atom of solid, the charge gained by solid in 1g is :

Answer 1

Answer:

The charge gained by solid in 1 g is 0.064 C.

Explanation:

Given that,

Mass = 1 kg

Atoms = $4\times10^{20}$

Number of electron,

n = 1 gm of $4\times10^{20}$ atoms

$n = \dfrac{1}{1000}\ kg$ of $4\times10^{20}$ atoms

$n = \dfrac{1}{1000}\times4\times10^{20}$

$n =4\times10^{17}$

Charge of electron is

$e = 1.6\times10^{-19}\ C$

The Charge is equal to the product of charge of electron and number of electron.

$Q = ne$

$Q = 4\times10^{17}\times1.6\times10^{-19}$

$Q=0.064\ C$

Hence, The charge gained by solid in 1 g is 0.064 C.

Answer 2

Explanation:

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