Wiktionary
n. the normal form of molecular oxygen, especially such a gas supplied industrially in cylinders
Usage examples of "oxygen gas".
A normal molecule of oxygen gas consists of two oxygen atoms joined together.
The bomb uses a chemical reaction to provide the heat and the power to mix a large volume of hydrogen and oxygen gas together in a compressed chamber that will produce the power of over two tons of TNT in the vacuum of space.
Even if we could supply them with high-tech dive gear and a helium-oxygen gas mixture for deep-water breathing, their chances are nil.
He's developed a system, which, thanks to the power we can get in that atpster, will sextuply ionize oxygen gas.
Water, as you know, consists of two parts of hydrogen to one of oxygen gas.
I held the oxygen bottle under Bob's nose as the major swung back in his arc, and let the raw, cold oxygen gas flow into his nostrils.
He bought it of a fairground charlatan who called it a Hydro-Oxygen Gas Microscope.