ind the partial pressure of oxygen in a sealed vessel that has a total pressure of 2.6 atm and also contains carbon dioxide at 1.2 atm and helium at 0.10 atm.

The partial pressures add to give the total pressure.

2.6 = x + 1.2 + 0.1

Solve for x, the oxygen partial pressure.

To find the partial pressure of oxygen in the vessel, we need to subtract the pressures of carbon dioxide and helium from the total pressure.

Partial pressure of oxygen = Total pressure - Partial pressure of carbon dioxide - Partial pressure of helium

Given:
Total pressure = 2.6 atm
Partial pressure of carbon dioxide = 1.2 atm
Partial pressure of helium = 0.10 atm

Partial pressure of oxygen = 2.6 atm - 1.2 atm - 0.10 atm

Partial pressure of oxygen = 1.3 atm

To find the partial pressure of oxygen in the sealed vessel, we need to subtract the partial pressures of carbon dioxide and helium from the total pressure.

1. Start by listing the given partial pressures:
- Carbon dioxide (CO2): 1.2 atm
- Helium (He): 0.10 atm

2. Add up the partial pressures of carbon dioxide and helium:
1.2 atm + 0.10 atm = 1.3 atm

3. Subtract the sum of the partial pressures from the total pressure to find the partial pressure of oxygen:
2.6 atm - 1.3 atm = 1.3 atm

Therefore, the partial pressure of oxygen in the sealed vessel is 1.3 atm.