a) a sphere, 6 ft in diameter, contains oxygen at 300 psia and 80°f. how many drums 6 in. in diameter and 2 ft long, which are initially devoid of any gas, can be filled to a pressure of 50 psia and 65°f? assume that the temperature of the oxygen left in the sphere remains at 80°f. (b) the same as (a) except that the drums initially contain o2 at 20 psia and 65°f.

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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.