oxygen
Yes, acid is produced but gas is not.
They produced food from light.
Just like any hydrocarbon, Carbon dioxide gas and water vapor will be produced, by burning polythene.
Human beings breath in oxygen, and breath out CO2. The plant's leaves, when making photosynthesis, use CO2 and a few other things to make photosynthesis. When finished with making photosynthesis, the leaves release some oxygen, which is the gas we use to breathe. Thus, oxygen is the useful gas made by photosynthesis.
Oxygen is the waste gas from photosynthesis which passes out through the stomates (stomata).
This gas is carbon dioxide.
carbon dioxide
hydrogen
Natural gas is natural gas. It is not made from crude oil or anything else. Thus the name.
hydrogen
Chlorine gas is produced.
It is produced by reacting nitrogen gas with hydrogen gas.
This gas is hydrogen sulfide, H2S.
Oxygen (O2), via photosynthesis.
Chlorine gas is produced.
Hydrogen gas is produced.
A salt. The type of salt depends on the type of acid.