So i have no idea how to do this problem. Permanant hard watee contains calcium sulfate and can be softened by


So i have no idea how to do this problem.
Permanant hard watee contains calcium sulfate and can be softened by adding sodium carbonate. Determine the number of moles sodium carbonate needed to react 27.2 moles of calcium sulfate.a. Write the chemical equationb. Balance the chemical equation​


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