Question

Why the percentage of oxygen is only 21% explain

Answer 1

The percentage of oxygen is only 21% because nitrogen takes up most of the air, and oxygen gets less domination in the air. This question does not have an exact answer.

Answer 2

Answer:

hey buddy ur answer goes on to the explanation

Explanation:

it is because in some places are more humid and some are more polluted the higher the concentration of other gasses in the air, the lower the concentration of oxygen. But you have to realize that oxygen constitutes 21 % of dry air, which is almost never actually is. And oxygen levels also change over longer periods of time.

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