Question

A 7.63-gram sample of hydrated magnesium sulfate MgSO4 xH2O is heated until all of the water is driven off. If 3.72 grams of anhydrous MgSO4 is obtained, how many water molecules combine with each formula unit of magnesium sulfate in the hydrate?
A) 5
B) 6
C) 7
D) 8

Answer

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