Chemistry

Question Analysis
This question involves converting the mass of three distinct gases (xenon, sulfur dioxide, ethylene) to moles, calculating the total moles of the mixture, and applying the mole fraction form of Dalton’s Law of Partial Pressures. The main focus is on integrating stoichiometric mass-mole conversion with partial pressure calculation for a mixture that includes a noble gas and covalent compounds.

Key Concept Explanation
For mass-based gas mixture problems, the core steps are consistent:
1. Calculate moles of each gas using the formula , where = mass of the gas and = molar mass of the gas.
2. Determine the total moles of the mixture by summing the moles of all components.
3. Find the mole fraction of the target gas: .
4. Calculate partial pressure via Dalton’s Law: .
This method is valid only for non-reacting ideal gas mixtures.

Step-by-Step Solution
1. Calculate moles of each gas:



2. Find total moles of the mixture: