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Why do balloon contains helium?

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Anonymous

10y ago
Updated: 8/16/2019

Helium is much less dense than air, which allows balloons to float. It is also chemically inert, which means hazards associated with it are minimal. Hydrogen gas is lighter and easier to obtain, which would make it seem ideal, but it is also highly flammable, which makes it dangerous.

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Wiki User

10y ago

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