Question

The pressure in a container which holds three gases: oxygen, carbondioxide and helium is 9 bar. The partial pressures of oxygen and carbondioxide are 2 bar and 3 bar respectively. What is the partial pressure of helium in the container?

Answer 1

Total Pressure (P$\sf\small{T}$) = 9 bar

Partial Pressure of Oxygen (P$\sf\blue\small{oxygen}$) = 2 bar

Partial Pressure of Carbon dioxide(P$\sf\blue\small{carbon dioxide}$) = 3 bar

So,

(P$\sf\small{he}$) = (P$\sf\green\small{T}$) - (P$\sf\blue\small{oxygen}$) +(P$\sf\small{carbon dioxide}$)

(P$\sf\pink\small{he}$) = 9 - (2 + 3)

(P$\sf\pink\small{he}$) = 4 bar