Is the pressure of a gas proportional with the concentration of a gas?

Is the pressure of a gas proportional with the concentration of a gas?


Because you can also use the pressure instead of the concentration in the equilibrium condition.




Assuming your gas follows the [ideal gas law](https://en.wikipedia.org/wiki/Ideal_gas_law), you have $PV=nRT$. Setting $c=\frac nV$ yields $P(c,T)=cRT$.


If the temperature is fixed, then $P(c)=(RT)c$ indeed tells us that **the pressure of a gas is proportional to its concentration**.


 3