Mass and Density

Density is mass per volume-unit

ρ = m/V

• m  mass in kg
• V   volume in m³
• ρ    density in kg m^-3

Example  

Find the volume of 25 g gold.

ρ = 19.3 x 10³ kg m^-3     m = 25 g = 0.025 kg

ρ = m/V     19.3 x 10³ = 0.025/V      (V) (19.3 x 10³) = 0.025      V = 0.025/(19.3 x 10³) = 1.30 x 10^-6 m³=

1.30 cm³