Respuesta :

Covalent compound CO2

Answer:

CO2

Explanation:

A covalent compound is a compound between 2 nonmetals.  For this reason, NaCl and MgO can be eliminated since both contain metals.  While neither H nor Br are metals, in HBr H is acting as a metal.  CO2 is the only choice containing both nonmetals, with both elements acting like nonmetals as well.

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