Answer:
must be equal to the amount of matter of the coal.
Explanation:
According to the law of conservation of matter, which states that matter can neither be created nor destroyed no matter how transformed it is. This means that the total amount of the reactants must equate the total amount of products.
In this question involving a reaction that causes a change of state from solid (coal) to gaseous (CO2 and other gases), in order to obey the law of conservation of mass, the total amount of the matter of the gases (products) must be equal to that amount of matter of the coal (reactants).
