Final answer:
Option (3) LiCI(aq) represents a mixture, as the notation (aq) signifies an aqueous solution where the substance is dissolved in water. Option 3 is correct.
Step-by-step explanation:
The question asks which formula represents a mixture. A mixture in chemistry is a combination of two or more substances in which they retain their individual properties and are combined physically rather than chemically. Looking at the provided options:
(1) C₆H₁₂O₆(l) - This is glucose in the liquid state.
(2) C₆H₁₂O₆(s) - This is glucose in the solid state.
(3) LiCI(aq) - Lithium chloride dissolved in water, which qualifies as a mixture.
(4) LiCI(s) - Lithium chloride in the solid state.
The notation (aq) indicates an aqueous solution, meaning that the substance is dissolved in water, which is the definition of a mixture. Therefore, the answer is (3) LiCI(aq).
The formula that represents a mixture is (3) LiCl(aq). The (aq) subscript indicates that the compound is dissolved in water, forming an aqueous solution. In contrast, (s) indicates a solid and (l) indicates a liquid. Therefore, LiCl(aq) represents a mixture.