sergiogaelito sergiogaelito
  • 03-11-2020
  • Social Studies
contestada

How much oxygen, in percentage, is there in the air we breathe. *

Respuesta :

davidstephenkargbo20
davidstephenkargbo20 davidstephenkargbo20
  • 15-10-2021

Explanation:

There is a 21 percent of oxygen

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