Problem: A student heated a 2.488 g sample of a hydrated iron chloride. After heating, the anhydrous iron chloride had a mass of 1.588 g. Calculate the percentage by mass of water in the hydrated compound.

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A student heated a 2.488 g sample of a hydrated iron chloride. After heating, the anhydrous iron chloride had a mass of 1.588 g. Calculate the percentage by mass of water in the hydrated compound.

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