Answer : The partial pressure of oxygen is, 799.19 torr
Solution :
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.
[tex]P_T=p_{H_2O}+p_{O_2}[/tex]
where,
[tex]P_T[/tex] = total partial pressure = 805 torr
[tex]P_{O_2}[/tex] = partial pressure of oxygen gas = ?
[tex]P_{H_2O}[/tex] = partial pressure of water = 25.81 mm Hg = 25.81 torr
Now put all the given values is expression, we get the partial pressure of the oxygen gas.
[tex]805\text{ torr}=25.81\text{ torr}+p_{O_2}[/tex]
[tex]p_{O_2}=779.19\text{ torr}[/tex]
Therefore, the partial pressure of oxygen gas is, 799.19 torr
