explain the difference between the following three substance carbon (c) carbon dixoide (co2) and oxygen (o2)

Answer 1

Carbon is a solid. The other two are gasses.

You breathe oxygen (O2) in and CO2 out. In combustion, O2 is a reactant and CO2 is a product.

That should get you started.

Do your own research. It isn't that hard in the internet age

Answer 2

waha gas do acids release when they are mixed with metals?