(Originais Teachy 2024) - Question Easy of Chemistry

During a laboratory class, students were challenged to replicate the classic Lavoisier experiment, in which magnesium is burned in a container with a lid. Before the burning, the container and its contents weigh 184.50g; after the experiment, the same container and contents weigh 186.95g. Considering that the only product of the reaction is magnesium oxide (MgO) and that the oxygen used to burn the magnesium comes from the air and therefore does not alter the mass of the container, answer: 1) What is the mass of magnesium oxide formed during the reaction? 2) Explain how this experiment demonstrates Lavoisier's Law of Conservation of Mass.