ASAP A 2.36-gram sample of NaHCO3 was completely decomposed in an experiment.

2NaHCO→ Na2CO3 + H2CO3

In this experiment, carbon dioxide and water vapors combine to form H2CO3. After decomposition, the Na2CO3 had a mass of 1.57 grams.

Determine the mass of the H2CO3 produced.

Calculate the percentage yield of H2CO3 for the reaction. Show your work or describe the calculation process in detail.

here's the answer to your question about

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

56 moles of   lieter in chemistry