Three of the primary components of air are carbon dioxide, nitrogen, and oxygen. in a sample containing a mixture of only these gases at exactly one atmosphere pressure, the partial pressures of carbon dioxide and nitrogen are given as pco2 = 0.285 torr and pn2 = 569.523 torr. what is the partial pressure of oxygen? answer in units of torr.

PO2 = 166.19 torr

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the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.