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The degree of polymerization, the average number of monomer units per polymer unit.

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Thermodynamics

The study of the energy transfers accompanying physical and chemical processes.

Designated area

An area that may be used for work with carcinogens, reproductive toxins, or substances that have a high degree of acute toxicity. A designated area may be the entire laboratory, an area of a laboratory, or a device such as a laboratory hood.

Noble Gases (Rare Gases)

Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.

Buret

A piece of volumetric glassware, usually graduated in 0.1-mL intervals, that is used to deliver solutions to be used in titrations in a quantitative (dropwise) manner.

Semiconductor

A substance that does not conduct electricity at low temperatures but does so at higher temperatures.

Second Law of Thermodynamics

The universe tends toward a state of greater diorder in spontaneous processes.

Partial Pressure

The pressure exerted by one gas in a mixture of gases.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Chemical Equilibrium

A state of dynamic balance in which the rates of forward and reverse reactions are equal, there is no net change in concentrations of reactants or products while a system is at equilibrium.

Cathode Ray Tube

Closed glass tube containing a gas under low pressure, with electrodes near the ends and a luminescent screen at the end near the positive electrode, produces cathode rays when high voltage is applied.