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Kymora
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Iodine-131 has a half life of 2.2 × 10-2 year. How long will it take to reduce a 130 g sample of 131I to 74 g 131I?
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Calculate the standard entropy change for the following reaction.
2 Al(s) + Fe2O3(s) → 2 Fe(s) + Al2O3(s)
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put it in mathway . com
