The rate at which two gases, methane, $\text{CH}_4$, and ethene, $\text{C}_2\text{H}_4$, diffuse is being investigated with the apparatus shown. Which gas diffuses more quickly, and why?
- Aethene; Ethene molecules are heavier and so move faster.
- Bethene; Ethene molecules have a double bond which makes them more reactive.
- Cmethane; Methane molecules are lighter and so move faster.
- Dmethane; Methane molecules are smaller so they can get out of the small hole more easily.