Density
| Formula / Notation | ρ = m/V |
|---|---|
| Also Known As | Mass density, specific gravity (ratio to water), relative density, ρ |
What is Density?
The mass per unit volume of a substance, typically expressed in g/cm³ or kg/m³. Density is an intensive property that depends on temperature and pressure. It is calculated as density = mass/volume and used to identify substances and predict buoyancy.
Formula & Notation
Other Names / Synonyms: Mass density, specific gravity (ratio to water), relative density, ρ
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The mass per unit volume of a substance, typically expressed in g/cm³ or kg/m³. Density is an intensive property that depends on temperature and pressure. It is calculated as density = mass/volume and used to identify substances and predict buoyancy.
Density measurements are used to identify substances, assess purity, monitor solution concentrations (density of battery acid, sugar solutions, alcohol content), in geological prospecting, industrial quality control, and in the design of flotation processes and liquid-liquid separations.
Dense gases (CO₂, Cl₂, H₂S) are heavier than air and accumulate in low-lying areas, creating asphyxiation or toxic hazards. Density measurements of reactive liquids should be done in appropriate apparatus. Pycnometers used with volatile or corrosive liquids require fume hood use.
The formula or notation for Density is: ρ = m/V