The table describes how some substances were formed.SubstanceDescriptionPFormed by boiling pure waterQFormed by combining three hydrogen atoms to every nitrogen atomRFormed by adding 5 g of sugar to 1 L of waterSFormed by compressing carbon under high pressureBased on the given descriptions, which substance is most likely a mixture?

R is the mixture because it is made by dissolving sugar in water, combining two substances physically. The sugar and water retain their identities and can be separated, unlike a pure substance formed through a chemical composition or process. Therefore, the substance formed by adding 5 g of sugar to 1 L of water is the most likely mixture.

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