Final answer:
To prove conservation of matter in a chemical reaction, the masses of the reactants and products should be compared to show that mass is conserved.
Step-by-step explanation:
In order to prove the conservation of matter in a chemical reaction, the masses of the reactants and the products should be compared. The total mass of the reactants should be equal to the total mass of the products, demonstrating that mass is conserved during the reaction. This can be achieved by recording the masses of the sugar, sulfuric acid, and glassware before the experiment, and then comparing them with the masses of the resulting reactants.