The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is

The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is Correct Answer Helium

Trimix is a mixture of oxygen, nitrogen and helium and is often used at depth in technical diving and commercial diving instead of air to reduce nitrogen narcosis and to avoid the dangers of oxygen toxicity.
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The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is:
The gas used to dilute oxygen for breathing by deep sea divers is:
In order to prepare Lithium nitride, air is passed gently over a reactor. Suppose that Nitrogen diffuse to a length 5cm before getting reacted with Lithium. Nitrogen reacts with lithium quickly so that partial pressure of Nitrogen at that point is 0. Reactor is a cylinder of length 10cm and diameter 2cm. Assume air to be a mixture of Nitrogen and Oxygen only. The temperature is 298K and total pressure 1atm. Diffusivity of N2 in O2 is 2*10-5m2/s. Calculate the Molar flux (mol/m2.s) of N2 at a distance of 2.5cm from the top with respect to an observer moving with twice the mass average velocity a direction towards the liquid surface. (R=8.205*10-5m3atmK-1mol-1). Assume z=0 at the top of the reactor.
Solution of nitrogen in liquid iron may be assumed to follow Sievert's law. Nitrogen content of liquid iron. at 1873K in equilibrium with 1 atm pressure of nitrogen is measured as 0.044 (mass %). What will be the equilibrium nitrogen content in liquid iron (mass%), if nitrogen pressure is reduced to 0.25 atm?
Why is helium added to oxygen which is used by deep-sea divers?
The fresh feed to an ammonia synthesis reactor contains nitrogen, hydrogen and 2.0 mole per cent inerts. The molar ratio of H2:N2 is 3:1. The product stream consists of pure ammonia. Since conversion in the reactor is only 15%, a recycle stream is used and in order to avoid build-up of inerts, a purge stream is withdrawn. The rate of purge stream is adjusted to keep inert concentration in the recycle stream at 8 mole per cent. For a fresh feed rate of 100 moles/hr. Note that recycle stream contains only nitrogen, hydrogen and inerts. The N2:H2 ratio of 1:3 is maintained in every process stream, and calculate the moles of nitrogen entering the reactor and in the recycle stream?
___________ is used as an inert gas for metal inert gas welding.
In deep-sea diving, divers use a mixture of gases consisting of oxygen and
Helium is added to the oxygen supply of deep sea divers because it is