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Graphite is a soft, slippery solid and has an unusually high melting point. What accounts for this unusual behavior?
- It is an allotrope of diamond
- It consists of molecules with widely varying molecular masses, as in polymers
- Its carbon atoms are arranged in extended sheets of strongly bonded rings, with weak forces between the sheets
- It does not have a crystalline structure
Correct answer: Its carbon atoms are arranged in extended sheets of strongly bonded rings, with weak forces between the sheets
Solution
Graphite is soft/slippery yet high-melting because carbon atoms form strongly bonded hexagonal sheets with only weak van der Waals forces between layers. It is crystalline, so the stored statement is wrong.
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