Describe how you could use properties to determine whether or not a sample of a substance is pure.

A pure solid has a constant/fixed melting point. A pure liquid has a constant/fixed boiling point. A pure gas may be made up of individual atoms

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a

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