A negatively charged balloon has 4.5 μC of charge.

How many excess electrons are on this bal- loon? The elemental charge is 1.6 × 10−19 C.
Answer in units of electrons.

To find the number of excess electrons on the balloon, you can use the formula:

Number of excess electrons = Total charge / Elemental charge

Given:
Total charge = 4.5 μC = 4.5 × 10^-6 C
Elemental charge = 1.6 × 10^-19 C

Using the formula:

Number of excess electrons = (4.5 × 10^-6 C) / (1.6 × 10^-19 C)

Calculating this gives:

Number of excess electrons = 2.8125 × 10^13 electrons

Therefore, the balloon has approximately 2.8125 × 10^13 excess electrons.

To find the number of excess electrons on the balloon, we can use the formula:

Number of electrons = Total charge / Charge of a single electron

The total charge on the balloon is given as 4.5 μC (microcoulombs), and we need to convert it to coulombs by dividing it by 10^6:

Total charge = 4.5 μC / 10^6 = 4.5 × 10^(-6) C

The charge of a single electron is given as 1.6 × 10^(-19) C.

Now we can plug these values into the formula:

Number of electrons = 4.5 × 10^(-6) C / (1.6 × 10^(-19) C)

Let's simplify this expression:

Number of electrons = (4.5 / 1.6) × 10^(-6 - (-19))

Simplifying further:

Number of electrons = 2.8125 × 10^13

Therefore, there are approximately 2.8125 × 10^13 excess electrons on the balloon.