Which jar contains a mixture? a jar of solid carbon a jar of carbon dioxide gas a jar of liquid copper a jar of copper and water

Solid carbon is an element in its solid state, not a mixture.
Carbon-dioxide gas is a compound in its gaseous state, not a mixture.
Liquid copper is an element in its liquid state, not a compound.
Copper will never dissolve in water, so copper in water is a mixture.

Answerwavelength;

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