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結果 : is oxygen gas lighter than air
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Lighter and heavier than air gases

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Is Carbon monoxide heavier than air?

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Flammable Vapors - heavier and lighter than air

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Is Nitrogen Gas Lighter Than Air?

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Hydrogen and Oxygen gas reaction

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Hydrogen is Lighter Than Air

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This New Element is Lighter than Hydrogen. What?!?!

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Simple Science Experiment | Co2 is heavier than Air | Demonstration

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How to know gases that are heavier or lighter than Air #gasweight

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Oxygen Tube Fires Are Insane!

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Hydrogen and Helium

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Hydrogen Pop Test Experiment

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What If Helium Replaced Oxygen for 1 Minute?

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Lighter than air

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