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3.4 Density Density and Temperature
 * the volume of most substances increases as the temperature increases however the temperature or volume will not alter the substance's mass.
 * density is the ratio of an objects mass to its volume.
 * generally, as the temperature increases the density decreases

Sample problem from page 91 Calculating dencity A copper penny has a mass of 3.1 g and a volume of 0.35 cm^3. What is the density of copper? 1. **ANALYZE**-list the knowns and unknowns Use the known values and the following definition of density. Density= mass/volume substitute the known values and solve for density. Density=mass/volume=3.1g/0.35cm^3=8.8571g/cm^3
 * Knowns:** mass=3.1 g, volume =0.35 cm^3 **Unknown:** density =? g/cm^3
 * 2. CALCULATE-**solve for the unknown
 * 3. EVALUATE-** Does the result make sense? the answer is yes

Nonmetals are in the upper right hand corner of the periodic table