What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm?

Dalton's law of partial pressures tells that the total pressure is the sum of the partial pressures. Therefore,

Ptotal = 0.45 atm + 0.25 atm + 0.60 atm = ??

To find the total pressure of a gas mixture, you simply add up the partial pressures of each individual gas component.

In this case, the gas mixture contains three gases - hydrogen, nitrogen, and argon - each with their own partial pressure. Given that the partial pressure of hydrogen is 0.45 atm, the partial pressure of nitrogen is 0.25 atm, and the partial pressure of argon is 0.60 atm, you can calculate the total pressure of the gas mixture by adding these partial pressures together.

Total Pressure = Partial Pressure of Hydrogen + Partial Pressure of Nitrogen + Partial Pressure of Argon

Total Pressure = 0.45 atm + 0.25 atm + 0.60 atm

Now you can simply perform the addition to find the total pressure of the gas mixture.

Total Pressure = 1.30 atm

Therefore, the total pressure of the gas mixture is 1.30 atm.