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3 years ago

10

A plastic rod that has been charged to -15.0nC touches a metal sphere. Afterward, the rod's charge is -10.0nC. How many charged

particles were transferred?

1 answer:

max2010maxim [7]3 years ago

7 0

Answer:

$3.125 X 10^{10}$

Explanation:

Net charge= -15.0 nC- -10.0 nC=-5nC

$\frac {-5 X 10^{-9}}{ -1.6 X 10^{-19}} = 3.125 X 10^{10}$ electrons were transferred

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Answer:

1.) The current is doubled

2.) moving a magnet up and down near the wire

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Explanation:

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Answer:

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Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 7.1 g. Silver has 47 electrons

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<u>Explanation:</u>

To calculate the number of moles, we use the equation:

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We are given:

Given mass of silver = 7.1 g

Molar mass of silver = 107.87 g/mol

Putting values in above equation, we get:

$\text{Moles of silver}=\frac{7.1g}{107.87g/mol}=0.066mol$

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According to mole concept:

1 mole of an element contains $6.022\times 10^{23}$ number of particles

So, 0.066 moles of silver will contain = - $(0.066\times 47\times 6.022\times 10^{23})=1.87\times 10^{24}$ number of electrons

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