Answer:
This question is incomplete
Step-by-step explanation:
This question is incomplete. The process described in the question is combustion; where a substance burns completely in excess oxygen to produce mainly carbon dioxide and then other gases. There is no chemical equation for this particular combustion reaction because coal is a mixture.
However, the amount of the matter of the gases produced from this combustion must be equal to the total number/amount of matter that constitutes the coal because of the law of conservation of matter that states matter can neither be created nor destroyed.