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Mass of aluminum cup 2.5g Mass of aluminum cup +alum 4.5g Mass of cup + alum after 1st heating 3.5g Mass of cup + alum after 2nd heating 3.6g Mass of cup + alum after 3rd heating 3.1g Mass of alum 0.6 Mass of water lost 1.4 B. Determine the moles of H2O lost. E. Write the empirical formula for hydrated alum, based on your experiment.

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