Understanding Partial Pressures

Dalton's Law of Partial Pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases.

* P_total = P_He + P_Ar + P_Xe

Solving the Problem

1. Identify the knowns:

* P_total = 2.60 atm

* P_He = 0.350 atm

2. Substitute the knowns into Dalton's Law:

* 2.60 atm = 0.350 atm + P_Ar + P_Xe

3. Solve for the combined partial pressure of Ar and Xe:

* P_Ar + P_Xe = 2.60 atm - 0.350 atm = 2.25 atm

Since the problem doesn't give us the partial pressure of Ar, we can't determine the partial pressure of Xe. We need more information.