Can sound
travel in places where there is no matter?

Sound is created by the vibrations of matter such as air. But theoretically if someone tried to make a sound in space where there is no matter, there would be nothing to vibrate so it wouldn’t make sound.

So no, sound needs matter to travel because sound itself is the vibration of matter.

Cause its being chemically applied?

answer: mole of the gas

answer: mole of the gasexplanation:

answer: mole of the gasexplanation: this is because 1 mole of a gas is 22.4dm³, which is use in ideal gas