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  2. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This implicitly puts the value of compounds' other constituents, and the cost of extraction of the element, at zero. ... Helium: 0.0001785: 0.008 (2.216 ...

  3. Scuba gas planning - Wikipedia

    en.wikipedia.org/wiki/Scuba_gas_planning

    As helium has no narcotic effect, this can be avoided by adding helium to the mixture so that the partial pressure of narcotic gases remains below a debilitating level. This varies depending on the diver, and there is significant cost in helium mixtures, but the increased safety and efficiency of work resulting from helium use can be worth the ...

  4. Trimix (breathing gas) - Wikipedia

    en.wikipedia.org/wiki/Trimix_(breathing_gas)

    Although theoretically trimix can be blended with almost any combination of helium and oxygen, a number of "standard" mixes have evolved (such as 21/35, 18/45 and 15/55—see Naming conventions). Most of these mixes originated from starting by decanting a given pressure of helium into an empty cylinder, and then topping up the mix with 32% nitrox.

  5. Party City: 11 Best Things To Buy Before Many Stores Close in ...

    www.aol.com/finance/party-city-11-best-things...

    This helium tank is now $29.99, marked down from $39.99. There is also a jumbo version of this product available, priced at $37.49, down from $49.99.

  6. The fate of America's largest supply of helium is up in the air

    www.aol.com/fate-america-largest-supply-helium...

    The U.S. is currently experiencing the fourth in a series of helium shortages since 2006, according to helium consultant Phil Kornbluth. “The world has experienced eight years of helium shortage ...

  7. Industrial gas - Wikipedia

    en.wikipedia.org/wiki/Industrial_gas

    A gas regulator attached to a nitrogen cylinder. Industrial gases are the gaseous materials that are manufactured for use in industry.The principal gases provided are nitrogen, oxygen, carbon dioxide, argon, hydrogen, helium and acetylene, although many other gases and mixtures are also available in gas cylinders.

  8. The world is running out of helium. Here's why doctors are ...

    www.aol.com/news/world-running-helium-heres-why...

    At any point, an MRI machine contains about 2,000 liters of liquid helium, though suppliers need to replenish any helium that boils off. Mahesh estimates that an MRI machine uses 10,000 liters of ...

  9. Gas blending for scuba diving - Wikipedia

    en.wikipedia.org/wiki/Gas_blending_for_scuba_diving

    All helium, and some of the oxygen is provided by decanting or boosting from bulk cylinders. The amount of helium that must be decanted is very simple to calculate: Multiply the desired gas fraction of helium (F He) by the total filling pressure (P tot) to get partial pressure of helium (P He). In the case of the Tx 20/40, in a 230 bar cylinder ...

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