Define description of chemical reactions

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Description of Chemical Reactions

Why when heating and cooling three different separate substances in open containers does the mass change in two of them (one loss mass; the other gained mass) but stays the same in the third when it is known that mass is conserved in chemical reactions? Would it be because one gave off vapor, the second melted and the third was a solid that wasn't heated enough to give off vapor or melt?

Reference no: EM13126625

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