Confused by an exercise on the subject of chemical equilibrium

[samy4408]

Homework Statement

I assume that they talk about partial pressure and calculate it instead of the concentration .

Relevant Equations

PV = nRT

Hello , i am a little confused about this exercise because we talk about gases reaction and we are asked about the concentrations
P.S : i have other questions that depends on your answer .
Thanks .

 

[Bystander]

Are you familiar with the concept of "fugacity?"

 

[samy4408]

no,this exercise is from the problem set of a course called "introduction to chemical equilibrium " and the concept of "fugacity" is not mentioned .

 

[Borek]

Concentration of a gas in a mixture is not much different from a concentration in general - just number of moles in a volume. Can be reasonably easily interconverted with the partial pressure.

 

[Chestermiller]

From the ideal gas law, what is the starting pressure?