In a closed container of constant volume, there is a gas mixture of 10kmol O2 and 20kmol CO2. The pressure and temperature of the mixture are 150 kPa and 300 K, respectively. Calculate the volume of the container

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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.