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Omar states in class that "all compounds are molecules, but not all molecules are compounds." Which example best supports his statement?

Answers:
A: Hydrogen gas (H2) is a molecule. It is not a compound because it is made of only one element.
B: Hydrogen gas (H2) is a compound. It is not a molecule because it is made of only one element.
C: Carbon dioxide (CO2) is a molecule. It is not a compound because it is made of more than one element.
D: Carbon dioxide (CO2) is a compound because it is made of more than one element. It is not a molecule because the elements are chemically bonded.

User Iboware
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1 Answer

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A is the answer, hydrogen is a diatomic molecule so there’s 2 hydrogen atoms bonded together. But it’s not a compound because it’s only one element.
User Supperhero
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