How much water is driven off when 344 g of gypsum (172 g/mol) is changed into plaster of Paris? Use H₂O = 18 g/mol.

ChemistryHardHigh School (9–10)GeneralAcids, Bases and Salts › Salts and Their Uses

How much water is driven off when $344\ \text{g}$ of gypsum ( $172\ \text{g/mol}$ ) is changed into plaster of Paris? Use $\text{H}_2\text{O} = 18\ \text{g/mol}$ .

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← Gypsum, CaSO₄ · 2H₂O (172 g/mol), is heated to make plaster of Paris, CaSO₄ · 1/2H₂O (145 g/mol). What mass of plaster comes from 86 g of gypsum?Why must plaster of Paris be stored in a moisture-proof container? →

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