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In order to make a hot pack, do you want to use a chemical that absorbs energy or releases energy?
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How many grams of oxygen gas will react completely with a block of calcium metal that is 3.0 cm by 3.5 cm by 4.2 cm, if the density of calcium is 1.55 g/ml? show all steps of your calculation as well as the final answer.
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In order to make a hot pack, do you want to use a chemical that absorbs energy or
releases energy?...
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