Which Balloon Has Hydrogen?

This is part of: The Double Life of RNA

Summary

Air is an invisible gas as are hydrogen and helium. How can you tell if a balloon contains hydrogen? Hydrogen has particular physical and chemical properties that can be tested. Dr. Cech enlists student volunteers to show how a chemical reaction can be used to identify a substance.

Clip: 
(Duration: 05 min 07 sec)
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