Someone adds 20 g of liquid water to 10 g of liquid methanol. Which substance is most likely the solvent?
Methanol is the solvent because it was present first.
Methanol is the solvent because there is less of it.
Water is the solvent because it is the liquid.
Water is the solvent because there is more of it.

Water is the solvent because there is more of it.

Explanation:

Solvent is the one that there is more of, and water is known as the 'universal solvent'.

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i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.