Which of the following best describes the relationship between the density, mass, and volume of a substance?

• A. Density is equal to mass divided by volume (density = mass / volume).
• B. Density is equal to volume divided by mass (density = volume / mass).
• C. Density is the difference between mass and volume (density = mass - volume).
• D. Density is the sum of mass and volume (density = mass + volume).

Answer: (A)

Verified step by step guidance

1. Recall the definition of density in chemistry, which relates how much mass is contained in a given volume of a substance.
2. Understand that density is a ratio comparing mass to volume, indicating how compact or concentrated the matter is.
3. Express this relationship mathematically as density equals mass divided by volume, written as \(\text{density} = \frac{\text{mass}}{\text{volume}}\).
4. Recognize that the other options (volume divided by mass, difference, or sum) do not correctly represent this physical property.
5. Conclude that the correct description of the relationship is that density is equal to mass divided by volume.