Oxygen

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Oxygen
Chemical formula O
Atomic Number
OTP appearance colorless gas 
Molar Mass(g/mol) 16 
Melting Point(°C) -218.8 
Boiling Point(°C) -219 
Density(g/cc) 0.0014 
Speed of sound
20°C, 1atm (m/s)
326
NFPA 704
NFPA704.png
0
3
2
ox

Under normal circumstances is a gas (O2). It is a primary constituent of air. All normal forms of fire convert oxygen and a fuel into carbon dioxide.

Uses

Primary

  • Respiration
  • Chemical oxidation

Natural occurrence

  • Elemental oxygen does occur naturally in air. At 20°C 1L of (dry) air contains .0079 mol of O2

Hazards

  • Fire
  • Most life will die in a pure oxygen environment

Production

Extraction

  • from air. See air for separation of the gases in air.

Chemical

Electrolytic

  • Electrolysis of water produces oxygen at the anode and hydrogen at the cathode
    2 H2O(l) - 4e- → O2(g) + 4 H+(aq)
    4H+(aq) + 4ei(aq) → H2(g)

Purification

Testing

Storage

Disposal

Oxygen can be released directly into the environment

See Also

References