This question is about mass measurements in a chemical reaction.
The subject of this question is Chemistry. The question is discussing mass measurements in a chemical reaction.
Based on the given information, the mass of the crucible and lid is A, the mass of the crucible, lid, and sample is B, the mass of sodium hydrogen carbonate is C, and the mass of the crucible, lid, and sample after heating is D.
The mass of sodium carbonate is E, the mass loss is F, and the mass loss percentage is G.