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Data Table 1: Conservation of Mass - Initial Mass Reaction Mass of test tube and 5% HC2H3O2 (g) (A) Mass of NaHCO3 (g) Mass oData Table 2: Moles of HC2H302 Reaction Volume Mass of Moles of HC2H302 # of 5% HC2H302 Vinegar (g) (mL) 5.0 0.25 4.17x10^-3Data Table 3: Moles of NaHCO3 Moles of NaHCO3 Reaction Mass of NaHCO3 (g) # 1 0.10 g 1.90x10^-3 mol 2 0.20 g 2.38x10^-3 mol 3Data Table 4: Theoretical Yield of CO2 Reaction # Theoretical yield of CO2 (moles) Theoretical yield of CO2 (g) Limiting Reac I need help answering these questions.

1. As the reaction was theoretically performed in a closed system, there should be no change in mass before and after the reaction. What are possible sources of error in your experiment reactions?

2. The chemical reaction you investigated is a two-step reaction. What type of reaction occurs in each step? How did you determine your answer?

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