Which of these statements is true of using melting and boiling points to identify a substance? Text to speech A:A. It is an effective method to identify gas molecules. B:B. It is the most affordable way to identify a substance. C:C. It is a property that changes based on the amount of a substance you have. D:D. It is a property that does not change regardless of the amount of a substance you have.

D:D. It is a property that does not change regardless of the amount of a substance you have.

Explanation:

Melting and boiling points are two chemical properties of a substance. These are used to identify whether a substance is solid, liquid, or gas.

The melting point is the temperature at which solid-state changes into liquid state. The boiling point is defined as the temperature at which liquid changes to gas.

The melting and boiling point are intensive properties that are independent of the amount of substance to be identified.

Hence, the correct answer is "D. It is a property that does not change regardless of the amount of a substance you have."