Which of the following particulate diagrams best represents a dilute aqueous solution of the nonelectrolyte glucose, C₆H₁₂O₆? (Each diagram describes the contents of a box of equal volume.)
a) 90 water molecules and 30 separate glucose molecules distributed throughout the box.
b) 90 water molecules and 4 separate glucose molecules distributed throughout the box.
c) 90 water molecules, 4 Na+ ions, and 4 Cl− ions, each ion surrounded by water molecules.
d) 90 water molecules and 4 glucose molecules clustered tightly together in one corner of the box.