Heliair

From Academic Kids

Heliair is a breathing gas consisting of mixture of oxygen, nitrogen and helium and is often used during the deep phase of dives carried out using technical diving techniques.

It is easily blended from helium and air and so always has a 21:79 ratio of oxygen and nitrogen with the balance consisting of helium.

See also trimix and heliox.

Template:Chem-stub

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