Identify the substance that is a molecular solid and explain how you got your answer. a....

Identify the substance that is a molecular solid and explain how you got your answer.

a. C(graphite)

b. H₂O

c. Sc

d. K₂S

Expert Solution

A molecular solid is a type of solid in which molecules are held together by van der Waals forces rather than by ionic or covalent bonds.

PROPERTIES OF MOLECULAR SOLIDS

The dipole forces are weaker than ionic or covalent bonds. The relatively weak intermolecular forces cause molecular solids to have relatively low melting points, typically less than 300 °C. Molecular solids tend to dissolve in organic solvents.

Most molecular solids are relatively soft, electrical insulators and have low density.

EXAMPLES OF MOLECULAR SOLIDS

water ice
solid carbon dioxide
sucrose or table sugar
hydrocarbons
fullerenes
sulfur
white phosphorus
yellow arsenic
solid halogens
halogen compound with hydrogen (e.g., HCl)
pnictogens (N₂)
light chalcogens (O₂)

H2O is a molecular solid

queen_honey_blossom answered 2 years ago

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