Question

How to solve this question​

Answer 1

Answer:

6.25x10¹¹

Explanation:

The charge on 1 electron = -1.6x10⁻¹⁹ C.  

A neutral object has no charge because it contains an equal number of electrons (negative) and protons (positive).  

If we remove N electrons, the object now has N more protons than electrons. So the object's charge is N x (1.6x10⁻¹⁹) C.  

N x (1.6x10⁻¹⁹) = 10⁻⁷  

N = 10⁻⁷ / ((1.6x10⁻¹⁹)  

= 6.25x10¹¹