How do we know that oxygen is 21 percernt in atmosphee?
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Hey friend..
Here is your answer..
We know it by taking air in a container and do experiments on it in laboratory.
In short, it is a experimarntal calculated value of oxygen in lab.
HOPE that it will help you
Here is your answer..
We know it by taking air in a container and do experiments on it in laboratory.
In short, it is a experimarntal calculated value of oxygen in lab.
HOPE that it will help you
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