Answer:
There are 2.5 x 10¹⁸ electrons in 0.4 C.
Explanation:
The charge of one electron = 1.602 x 10⁻¹⁹ C
Therefore, the number of electrons in 0.4 C is calculated as follows;
1.602 x 10⁻¹⁹ C -------------> 1 electron
0.4 C --------------------------> x
x = (0.4 ) / (1.602 x 10⁻¹⁹)
x = 2.5 x 10¹⁸ electrons
Therefore, there are 2.5 x 10¹⁸ electrons in 0.4 C.
