A tank with a volume of 600 cm3 contains a 2-phase mixture of R-134a at a temperature of -8 °C. The mass of liquid present is 4 times the mass of vapor.a. Find the pressure in the tank.b. Find the total mass of R-134a in the tank.c. Find the volume of the liquid present.

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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.