A negatively charged balloon has 3.1 μC of
charge.
How many excess electrons are on this bal-
loon?
Answer in units of electrons.
each electron has a magnitude of charge 1.602*10^-19. So, divide the excess charge by the single electron charge to get a number of electrons. (3.1*10^-6 Coul)/(1.602*10^-19 Coul/e) = 1.9 *10^13 excess electrons.
To find the number of excess electrons on the balloon, we need to use the elementary charge and the total charge on the balloon.
The elementary charge, represented by "e," is the magnitude of the charge of a single electron, which is approximately 1.6 x 10^-19 coulombs (C).
Given that the balloon has a charge of 3.1 μC (microcoulombs), we need to convert this value to coulombs by dividing it by 10^6 (since 1 μC = 10^-6 C).
3.1 μC = 3.1 x 10^-6 C
Now we can calculate the number of excess electrons by dividing the total charge by the elementary charge.
Number of excess electrons = Total charge / Elementary charge
Number of excess electrons = (3.1 x 10^-6 C) / (1.6 x 10^-19 C)
Calculating this division, we get:
Number of excess electrons ≈ 1.94 x 10^13 electrons
Therefore, there are approximately 1.94 x 10^13 excess electrons on the negatively charged balloon.