How do we know that oxygen is 21 percernt in atmosphee? – InterviewSolution

InterviewSolution

1.	How do we know that oxygen is 21 percernt in atmosphee?
Answer» END..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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