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1. In the laboratory, a student carried out the reaction: CaCO3(s) + 2HCl(aq) CaCl2(aq) + HO(1) + CO2(g) The following data was collected: Mass of container: 48.3650g Mass of container + CaCO: 48.6380g Mass of container + contents after evaporation of liquid: 48.6640g Based on the above data, calculate: a. Starting mass of CaCO3: b. Mass of CaCl2 obtained: C. Mole ratio of CaCO3 to CaCl2 2. List possible sources of error in this experiment.

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