Definition: This is a property of matter that can be identified without changing the identity of the substance.
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I completely ignored sig figs though
Answer:
Carbon dioxide (chemical formula CO 2) is an acidic colourless gas with a density about 53% higher than that of dry air. Carbon dioxide molecules consist of a carbon atom covalently double bonded to two oxygen atoms.
In CO2, the Carbon atom is in the central position as it is the least electronegative atom in the molecule. Two Oxygen atoms are located on the terminals where both these atoms share electrons and form bonds with the central Carbon atom.
Lewis structure of CO2 given in the attached image:
