braddog60501 braddog60501
  • 06-08-2019
  • Chemistry
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Oxygen is a critical component in any fire. However, it is generally not a limiting factor in natural fires because oxygen (O2) makes up __________% of Earth’s atmosphere.

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jessicatrieu
jessicatrieu jessicatrieu
  • 07-08-2019
... oxygen (O2) makes up 21% of the Earth’s atmosphere.
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