Which equation is used to determine the density of a substance?

• A. density = mass / volume
• B. density = volume / mass
• C. density = mass × volume
• D. density = mass + volume

Answer: (A)

Verified step by step guidance

1. Understand that density is a physical property that relates the mass of a substance to the amount of space it occupies, which is its volume.
2. Recall the definition of density, which is the ratio of mass to volume, meaning how much mass is contained in a given volume.
3. Express this relationship mathematically as \(\text{density} = \frac{\text{mass}}{\text{volume}}\).
4. Recognize that the other options (density = volume / mass, density = mass × volume, density = mass + volume) do not correctly represent this relationship.
5. Therefore, the correct equation to determine the density of a substance is \(\text{density} = \frac{\text{mass}}{\text{volume}}\).