Will you check my answers please?

A volt is a unit of current and an amprere is a unit of current.

It is common to call electric potential difference- voltage

A current of 1 ampere is a flow of charge at the rate of 1 coulomb per second.

When a charge of 15 C flows through any area in a circuit each second, the current is 15 A.

One volt is the potential difference between two points if 1 joule of energy is needed to move _________ coulomb of charge between the two points? (This question I don't understand)

Your very first statement is wrong. A volt is a unit of electric potential, not current.

Your last question is answered if you write "one" in the blank space. One Volt is one Joule per Coulomb of charge.

Sure, I'd be happy to check your answers!

1. A volt is NOT a unit of current, but rather a unit of electric potential difference. The correct unit for current is ampere (A).

2. Yes, it is indeed common to call electric potential difference "voltage."

3. Correct! A current of 1 ampere represents a flow of charge at the rate of 1 coulomb per second.

4. This statement is incorrect. Current is the rate of flow of charge, so if a charge of 15 coulombs flows through any area in a circuit each second, the current would be 15 amperes, not 15 A.

5. The missing word in the question should be "1," as in "One volt is the potential difference between two points if 1 joule of energy is needed to move 1 coulomb of charge between the two points."

So, in summary:
Statement 1 is incorrect.
Statements 2 and 3 are correct.
Statement 4 is incorrect.
The missing word in Statement 5 is "1."

Please let me know if you have any other questions or if there's anything else I can assist you with!