A container is filled with a mixture of gases:

O2, which has a pressure of 1.0 atm.

N2, which has a pressure of 0.75 atm,

And Cl2 at some unknown pressure.

If the total pressure in the container is 3.30 atm, what is the pressure of Cl2?

The pressure of Cl2 is 1, 55 atm.

Explanation:

The sum of the partial pressures of the gases that make up a gaseous mixture is equal to the total pressure of said mixture, according to Dalton's law:

P total = P02 + P N2 + P Cl2

P Cl2 = P total - P02 - P N2=3,30 atm-1,0 atm - 0,75 atm=1,55 atm