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You can get helium balloons filled at party supply stores, grocery stores, or stores that specialize in balloons and party decorations.
They are filled by Hydrogen gas.
258 helium filled balloons filled to 34 psi each
When tires or balloons are filled with gas or air, they are said to be in an inflated state.
Helium
bcoz helium is lighter than air
Balloons are not called helium; they can be filled with helium because this gas is not flammable and has a very low density.
Helium-filled balloons typically last longer than carbon dioxide-filled balloons. Helium is a lighter gas that causes balloons to float higher and stay inflated longer due to its lower density. In contrast, carbon dioxide is heavier and escapes balloons more quickly, leading to a shorter lifespan.
filled the room
It is simply air that has been heated. Hence the namehot air balloons are filled with hot air from a propane tank
If I am right in interpreting the question as "Are balloons normally filled with hydrogen and oxygen?", then the answer would be no. Although they can be, as both substances are gases, the majority of balloon are filled with air, a mixture of nitrogen, oxygen, carbon dioxide and other gases. If you mean the balloons that float, they are filled with helium
Yes, balloons filled with helium will be buoyant in air