Which would you expect to have a higher melting point: sodium chloride, NaCl, or aluminum oxide, Image?
A) The aluminum oxide has a higher melting point because it is a larger molecule and has a greater number of molecular interactions.
B) NaCl has a higher melting point because it is a solid at room temperature.
C) The aluminum oxide has a higher melting point because of the greater charges of the ions, and hence the greater force of attractions between them.
D) The aluminum oxide has a higher melting point because of the covalent bonds within the molecule.
Answer: C
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