A particular gas sample is made up of O2 molecules and H2 molecules. What sort of substance is it?ElementCompoundMixture

To classify the gas sample made up of O₂ (oxygen) and H₂ (hydrogen) molecules, we need to analyze the components of the sample:

1. Definition of Terms:

   • Element: A pure substance that cannot be broken down into simpler substances by chemical means. Examples include O₂ (oxygen) and H₂ (hydrogen).
   • Compound: A substance formed when two or more elements are chemically bonded in a fixed proportion. For example, water (H₂O) is a compound made of hydrogen and oxygen.
   • Mixture: A material made up of two or more different substances which are not chemically combined.

2. Composition of the Gas Sample:

   • The gas sample consists of both O₂ and H₂ molecules. Since these are different types of gas molecules and they are not chemically combined, they do not form a compound.

3. Conclusion:

   • As the sample contains a combination of two different gases (O₂ and H₂) without any chemical bonding, it is classified as a Mixture.

Final Answer

The gas sample is a Mixture.