A solution contains 90 mL of methanol, 18 mL of propanol, and 2 mL of diethyl ether. Which is the solvent in this solution?

The solvent is usually the substance present in the greatest amount in a solution. Methanol makes up 90 mL, more than propanol at 18 mL and diethyl ether at 2 mL, so methanol is the solvent.

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