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is c2h2 covalent or ionic
is c2h2 molecular or ionic
is c2h4 ionic or covalent
is c2h2 a covalent compound
is c2h5oh ionic or covalent
c2h4o2 ionic or covalent
is hc2h3o2 ionic or covalent
is cah2 ionic or covalent
c2h5no2 ionic or covalent
is h2 covalent or ionic
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