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Combustible Gases Heavier Than Air

The average molecular weight of air is 29, making gases with a molecular weight greater than 29 heavier than air.

liquefied propane
Combustible organic gases heavier than air include propane, butane, propylene, butadiene, acetylene, cyclopropane, dimethyl ether, and ethylene oxide. Inorganic combustible gases heavier than air encompass hydrogen sulfide, phosphine, and silane.



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