Yes. A gas will expand to fill a space evenly.
A vacuum tube does not contain any gases. All the gases are evacuated from the tube and only vacuum is left.
Theoreticaly there are no gasses in a total vacuum
No. Only light waves can travel through a vacuum.
There are no harmful gases in space. There are no gases. Space is a vacuum. Astronauts wear a pressure suit so that they are not exposed to the vacuum, which could kill them.
Expand.
None, the inside is a vacuum.
Gases will expand to fill their containers.
compressibility
when you fill very relaxed
When you fill by blowing into it, it up it's nitrogen, oxygen, carbon dioxide, a bit of water vapor and trace amounts of other gases. . But to make it float you fill it with helium.
expand
Intermolecular bonds in gases are extremely weak; because of this gases can easily expand.