An equimolar mixture of \(\text{CH}_4\text{(g)}\) (molar mass \(16\text{ g/mol}\)) and \(\text{SO}_2\text{(g)}\) (molar mass \(64\text{ g/mol}\)) is placed in a sealed container at \(298\text{ K}\). A microscopic pinhole is opened in the container wall, allowing gas molecules to effuse into an adjacent evacuated chamber. Which of the following best predicts the composition of the gas mixture collected in the evacuated chamber during the initial stages of effusion, and provides the correct justification?