Answer : The volume of dry oxygen gas at STP is,
Explanation :
First we have to calculate the pressure of oxygen gas.
Pressure of oxygen gas = Total pressure - Pressure of water
Pressure of oxygen gas = 765 mmHg - 71.9 mmHg
Pressure of oxygen gas = 693.07 mmHg
Now we have yo calculate the volume of dry oxygen gas at STP.
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
where,
= initial pressure of gas = 765 mmHg
= final pressure of gas = 760 mmHg (atSTP)
= initial volume of gas =
= final volume of gas = ?
= initial temperature of gas =
= final temperature of gas = (at STP)
Now put all the given values in the above equation, we get:
Therefore, the volume of dry oxygen gas at STP is,