0.250 mole of cyclopentane, C5H10. What is the mole fraction of cyclopentane i

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Q: b 'k 0.2 0.4 0.6 0.8 1 Mole fraction of B, xB Temperature, T 0.16 0.23 0.57 0.67 0.84

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Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.