PLEASE HELP A 3.81-gram sample of NaHCO3 was completely decomposed in an experiment.
2NaHCO3 - Na2CO3 + H2CO3
In this experiment, carbon dioxide and water vapors combine to form H2CO3. After
decomposition, the Nazco, had a mass of 2.86 grams.
A. Determine the mass of the H2CO3 produced.
B. Cáiculate the percentage yield of H, Co, for the reaction. Show your work or describe the
calculation process in detail.

law of conservation of matter

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

5.6⋅10−^19  j

do you need the explaination?