AP Chemistry Multiple Choice Practice Test

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2.500 grams of MgSO4xH2O, a hydrated salt with an unknown water content, is dried in an oven to remove the water. After drying, the anhydrous salt has a mass of 1.221 grams. How many moles of water are present per mole of hydrated magnesium sulfate?

	5
	1
	7
	3
	9