Why we add helium or nitrogen in signing cylinders?
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- Helium is used in scuba tanks to dilute oxygen.
- Helium is used in scuba tanks to dilute oxygen. Second, helium is much less soluble in water than many other gases, such as nitrogen. The low solubility means it does not enter the bloodstream, even under pressures commonly experienced by deep-sea divers. Underwater, a scuba diver is subjected to added pressure.
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