Density is defined as mass divided by volume, and its common units include:

• A. Mass; g/mL
• B. Volume; g/mL or g/cm3
• C. Temperature; degrees Celsius
• D. Pressure; atmospheres

Answer: (B)

Density tells you how much matter is packed into a given space. It’s defined as mass divided by volume, so the units must combine mass and volume. The common density units are grams per milliliter (g/mL) and grams per cubic centimeter (g/cm^3), which literally describe how many grams of substance are in each milliliter or cubic centimeter of volume. Temperature (degrees Celsius) and pressure (atmospheres) measure different properties and do not describe density. So the units that best express density are mass per volume, namely g/mL or g/cm^3.