Select ALL the correct answers. Which of the following statements about energy in systems are true?

The amount of energy in a system must equal the amount of matter in the system.
Energy can be changed from one form to another.
When energy leaves a system, it is transformed into matter.
Energy can be transferred into or out of a system.

When energy leaves a system it is transformed into matter

Explanation:

First Law of Thermodynamics: Energy can be changed from one form to another, but it cannot be created or destroyed. The total amount of energy and matter in the Universe remains constant, merely changing from one form to another.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

the correct answer is d