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    Calcium oxide
    Time: 2015-01-30

    Calcium oxide, commonly known as quicklime or lime, chemical formula CaO, is a common inorganic compound. Calcium oxide, usually obtained from limestone or seashells, heats a substance containing calcium carbonate to 500-600 ° C, causing it to decompose into calcium oxide and carbon dioxide. It's one of the few chemical reactions known from prehistoric times.

      
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