Q: What is the lightest molecule?


Read this paragraph and choose the correct option from the provided answers:

Based on their molar masses, hydrogen is the lightest molecule, and oxygen is the heaviest. Because all three volumes are the same, each balloon contains the same number of gas molecules. Therefore, the hydrogen balloon will have the lowest mass, and the oxygen balloon will have the highest.

 Choices:

- oxygen

- helium

- silicon

- hydrogen


A:
hydrogen