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How many electrons must be added to an object to give it an overall net charge of -3.0 x 10^-7 C? The charge of an electron is -1.602 x 10^-19 C.
1.9 x 10^12 electrons
3.1 x 10^13 electrons
2.0 x 10^10 electrons
1.4 x 10^14 electrons

Respuesta :

skyluke89

The number of electrons is [tex]1.9\cdot 10^{12}[/tex]

Explanation:

The total net charge on a negatively-charged object is given by

[tex]Q=Ne[/tex]

where:

N is the number of excess electrons

[tex]e[/tex] is the charge of a single electron

In this problem, we have

[tex]Q=-3.0\cdot 10^{-7}C[/tex] is the overall charge of the object

[tex]e=-1.602\cdot 10^{-19}C[/tex] is the charge of one electron

Solving the equation for N, we find:

[tex]N=\frac{Q}{e}=\frac{-3.0\cdot 10^{-7}}{-1.602\cdot 10^{-19}}=1.9\cdot 10^{12}[/tex]

Learn more about electrons and other particles:

brainly.com/question/2757829

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