how many moles of calcium carbonate are produced from 8.0 moles of sodium carbonate?

Answer 1

In order to produce calcium carbonate from sodium carbonate, a reaction must take place. Calcium carbonate (CaCO3) is insoluble and forms a precipitate, so we can write the following net ionic equation:

CO3^2-(aq) + Ca²⁺(aq) ==> CaCO₃(s)

8.0 mols CO3^2- ==> 8.0 mols CaCO₃

Sodium carbonate = Na₂CO₃ so 8.0 mols of this will provide 8.0 mols of carbonate anion (CO₃^2-), this 8.0 moles of CaCO₃ (provided there is sufficient Ca²⁺ present).