A mixture of Nitrogen, Oxygen, and Helium gas is collected in a container at 1 atmosphere, if the partial pressure of oxygen is 320 mm and helium's pressure is 112, what is the partial pressure of the nitrogen?
And we know
Assumptions made: Partial pressures given for oxygen and helium are in mmHg and required answer is in mm Hg.
First, convert the total pressure of system 1 atm to mm Hg:
According to Dalton's Law of partial pressure:
If you need the value in atmosphere: