**Q2: **

Which of the following is the best definition of electrical current, as measured in amperes?

- AThe energy dissipated per coulomb of electrons between two given points
- BThe number of electrons that pass a given point in one second
- CThe energy dissipated per electron between two given points
- DThe number of coulombs of electrons that pass a given point in one second
- EThe energy dissipated by the electrons passing between two given points in one second

**Q3: **

If a redox couple is at equilibrium in an electrochemical cell, which of the following statements about the current and potential is most accurate?

- AThe current is negative, and the potential is zero.
- BThe current and potential are both zero.
- C The current is positive, and the potential is zero.
- DThe current is zero, and the potential is given by the Nernst equation.
- EThe potential is zero, and the current is given by the Nernst equation.