Chemistry

Question Analysis
This question assesses the student's ability to apply Dalton's Law of Partial Pressures to determine the total pressure in a gas mixture from given partial pressures.

Key Concept Explanation
Dalton's Law of Partial Pressures states that the total pressure of a gas mixture is the sum of the partial pressures of each individual gas in the mixture.

Step-by-step Solution
1. Identify the partial pressures of the gases: 800 kPa for nitrogen and 200 kPa for oxygen.
2. Add the partial pressures together: .
3. Perform the addition:

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