Chemistry

Question Analysis
This question evaluates the student's ability to use Dalton’s Law of Partial Pressures to find the partial pressure of an unknown component in a gas mixture.

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 component in the mixture.

Step-by-step Solution
1. Identify the known partial pressures: nitrogen (300 kPa) and oxygen (200 kPa).
2. Identify the total pressure of the mixture: 550 kPa.
3. Use the formula for the total pressure: .
4. Substitute the known values:

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