All are gases so no visible reaction persay, unless in closed quarters and then massive pressure.
The answer is C. the carbon symbol C with one dot on each
the top, bottom, left, and right sides
I dont know that’s a hard one I’m in 7 th grade so google it bruh lol
Compound is X3Y2.
Hope this helps you!
Filtration
distillation
crystallization
chromatography