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 = 585.313 torr. what is the partial pressure of oxygen?
answer in units of torr.

174.402 Torr is the partial pressure of oxygen gas.

Explanation:

According to the Dalton's law, the total pressure of the gas is equal to the sum of the partial pressure of the mixture of gasses.

where,

= Total pressure

= partial pressure of gas-1

= partial pressure of gas-2

= partial pressure of gas-3

= partial pressure of nth gas in the mixture

We have:

Now put all the given values is expression, we get the partial pressure of the gas.

174.402 Torr is the partial pressure of oxygen gas.

the answer is 1 i believe