Question

the vapour density of helium gas is?​

Answer 1

Answer:

Hydrogen (density 0.090 g/L at STP, average molecular mass 2.016 g/mol) and helium (density 0.179 g/L at STP, average molecular mass 4.003 g/mol) are the most commonly used lift gases.

Answer 2

4.6. 3 Vapor Density

Gas Formula Concentration [%]

Methane CH4 0.00020

Helium He 0.00052

Krypton Kr 0.00011

Hydrogen H2 0.00005