What are the characteristics of gases?

    Some common characteristics of gases are

*They can expand to fit their container regardless of size

*When condensed, they become liquids
*They can be compressed so that their volume decreases
*Their molecules have little attraction since they are spaced so far apart,
so most of the volume in air is empty space

A gas molecule (they tend to fly around)

*They also have simple formulas and low molecular mass

Here is a table with some common gases and their characteristics

Formula	Name	Characteristics
H2	Hydrogen	Flammable, lighter than air
He	Helium	Colorless, nonflammable, lighter than air
HCN	Hydrogen cyanide	Toxic, has been used historically to shorten people's lives
HCl	Hydrogen chloride	Toxic, corrosive
H2S	Hydrogen sulfide	Toxic, smells like rotten eggs
CO	Carbon monoxide	Toxic, Jack Kervorkian's favorite gas
CO2	Carbon dioxide	Colorless, odorless, not toxic, but unsupportive of respiration
CH4	Methane	Colorless, odorless, flammable, occasional byproduct of the digestive system
N2O	Nitrous oxide	Colorless, sweet odor, makes you feel "funny"
NO2	Nitrogen dioxide	Toxic, red-brown, irritating odor
NH3	Ammonia	Colorless, pungent odor
SO2	Sulfur dioxide	Colorless, irritating odor

  What behaviors are described by the gas laws?

  What conditions will cause a gas to condense?