Estimate the pressure kPa(a) in the tank and density (kg/m3 ) of the gas mixture in the tank where  Components /Mass Composition CO2 /0.2 O2 /0.7 N2 /? Total mass of gas in tank 25 kg Height of the tank 1.5 m Diameter of tank 2 m Temperature of tank 30 °C

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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.