Final answer:
The question involves Dalton's Law of Partial Pressures, which is used to calculate the total pressure of a gas mixture by summing the partial pressures of nitrogen, oxygen, and helium. The total pressure is 521 torr.
Step-by-step explanation:
The question relates to Dalton's Law of Partial Pressures, which states that the total pressure of a gas mixture is the sum of the partial pressures of each individual gas component. In the given gas mixture, nitrogen (N2), oxygen (O2), and helium (He) have partial pressures of 226 torr, 137 torr, and 158 torr, respectively.
To calculate the total pressure of the gas mixture, we would add up the partial pressures of N2, O2, and He:
- Partial pressure of N2: 226 torr
- Partial pressure of O2: 137 torr
- Partial pressure of He: 158 torr
Total pressure = 226 torr + 137 torr + 158 torr = 521 torr