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?

Answer 1

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 = ??