activity series  
  bond energy
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  common names

  conversion factors: energy

  conversion factors: length

  conversion factors: mass

  conversion factors: pressure

  conversion factors: temp.

  conversion factors: volume

  covalent prefixes

  density solver

  diatomic elements

  e-config. chart

  element list

  gas law formulas

  Ka's of polyprotic acids

  Ka's of weak acids

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  metric conversion chart

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  periodic table

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  pH/pOH converter

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  pressure converter

  SI units

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  solubility of salts rules

  solubility product constants

  stoichiometry chart

  temp. conversion

  temp. formulas

  thermodynamic data

  vapor pressure of water

Density (d) is the ratio of the mass (m) of a substance to the volume (v) occupied by the substance. Pure water is used as the standard in measuring density. The density of pure water is 1.0 g/mL. If a substance has a density less than water, it will float; if a substance has a density greater than water, it will sink. How can you explain the soda cans in the photo below? Some float in water, others sink, all are unopened cans of soda.

Mass is expressed in grams (g). Volume of liquids is expressed in either milliliters (mL) or cubic centimeters (cc or cm3). Due to thieir low density, the volume of gasses is expressed in liters (L). Thus, density can be expressed as g/mL, g/cm3 or g/L (for gasses). The formula for density is:

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