Water, oxygen and glucose are converted into carbon dioxide through photosynthesis. Carbon dioxide is a kind of carbon-oxygen compound, which is a common compound in the air.
Carbon dioxide is colorless, odorless, non-combustion-supporting, nonflammable under normal pressure, and slightly soluble in water to form carbonic acid. Carbonic acid is a weak acid. Carbon dioxide can usually be prepared by calcining limestone at high temperature or by reacting limestone with dilute hydrochloric acid.
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