A mixture of gases at a total pressure of 95 kPa contains N2, CO2, and O2. The partial pressure of the CO2 is 24 kPa and the partial pressure of the N2 is 48 kPa. What is the partial pressure of the O2?

Isn't the sum of the partial pressures equal to the total pressure?

I have no idea how to do these questions. So i don't know.

Reread my comment. See if you can work it from that. I will be happy to critique your thinking.

Thank you, that's what i did, And i got the answer right!!

the pressure 25.0 meters under water is 347 kPa, what is this pressure in bar?

12 ml of nitrogen gas is collected at 70.0 c the pressure in the container is 125 kpa what will be the volume of the gas stp ?

To find the partial pressure of O2, we need to use the fact that the total pressure of the mixture is the sum of the partial pressures of each gas. The total pressure of the mixture is given as 95 kPa.

We know that the partial pressure of CO2 is 24 kPa, and the partial pressure of N2 is 48 kPa. To find the partial pressure of O2, we can subtract the sum of the partial pressures of CO2 and N2 from the total pressure of the mixture.

Partial pressure of O2 = Total pressure - (Partial pressure of CO2 + Partial pressure of N2)
Partial pressure of O2 = 95 kPa - (24 kPa + 48 kPa)
Partial pressure of O2 = 95 kPa - 72 kPa
Partial pressure of O2 = 23 kPa

Therefore, the partial pressure of O2 in the mixture is 23 kPa.