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Chemistry, 21.06.2019 19:30
The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?
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Chemistry, 22.06.2019 18:50
Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g. what is the percent by mass of water in the hydrate? %
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Explain the difference between an exothermic and an endothermic reaction....
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