Please help !!

When a gas like the one shown is released into a room, it tends to fill the room. Kinetic molecular theory explains this by assuming
that

A) gas particles are heavy.

B) gas particles travel as individual atoms.

C) gas particles are extremely light

D) gas particles have no attraction for each other.

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

What can be found in the ionosphere

In salt water solution,the salt is the blank