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# Density

See all sections
Sections
Classification of Matter
Physical & Chemical Changes
Chemical Properties
Physical Properties
Intensive vs. Extensive Properties
Temperature
Scientific Notation
SI Units
Metric Prefixes
Significant Figures
Significant Figures: Precision in Measurements
Significant Figures: In Calculations
Conversion Factors
Dimensional Analysis
Density
Density of Geometric Objects
Density of Non-Geometric Objects

Density represents the mass of an object or compound within a given volume.

###### Understanding Density

Concept #1: Density

Example #1: If the density of an unknown metal is 21.4 g/cm3, express its density in lb/ft3.

Practice: When lead levels in blood exceed 0.80 ppm (parts per million) the level is considered dangerous. 0.80 ppm means that 1 million g of blood would contain 0.80 g of Pb. Given that the density of blood is 1.060 kg/cm3, how many grams of Pb would be found in 400.00 mL of blood at 0.620 ppm?