As you guys can see I chose claim 2 that molecules in a substance move differently when a substance changes phase. I need details to that support molecules in a substance move differently when a substance changes phase. Can you guys give me details?

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.