The charge on an object is determined by the number of excess electrons and the charge of a single electron. The charge of one electron is approximately $-1.6 \times 10^{-19}$ coulombs.

To calculate the total charge $Q$ on the object, multiply the number of excess electrons $n$ by the charge of one electron $e$:

$Q = n \times e$

Given:

• $n = 750$
• $e = -1.6 \times 10^{-19}\, \text{C}$

Substitute the values:

$Q = 750 \times (-1.6 \times 10^{-19}) = -1.2 \times 10^{-16}\, \text{C}$

Thus, the charge on the object is $-1.2 \times 10^{-16}$ coulombs.

Would you like more details or have any questions?

Here are 5 related questions you might find interesting:

1. What is the charge on an object with 1000 excess electrons?
2. How many electrons are required to give an object a charge of $-3.2 \times 10^{-19}$ C?
3. What is the total charge on 1 mole of electrons?
4. How does the charge of protons compare to that of electrons?
5. How do conductors and insulators behave in terms of excess charges?

Tip: Remember that electrons carry a negative charge, so the excess charge on an object with extra electrons is always negative.