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A method used to determine the molecular weights of volatile liquids.

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First Law of Thermodynamics

The total amount of energy in the universe is constant (also known as the Law of Conservation of Energy) energy is neither created nor destroyed in ordinary chemical reactions and physical changes.

Background Radiation

Ratiation extraneous to an experiment. Usually the low-level natural radiation form cosmic rays and trace radioactive substances present in our environment.

Alkaline Battery

A dry cell in which the electrolyte contains KOH.

Condensed Phases

The liquid and solid phases, phases in which particles interact strongly.

Fossil Fuels

Substances consisting largely of hydrocarbons, derived from decay of organic materials under geological conditions of high pressure and temperature (metamorphism) include coal, petroleum, natural gas, peat and oil shale.  For further information see Fuel Chemistry

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Insoluble Compound

A very slightly soluble compound.

Emulsion

Colloidal suspension of a liquid in a liquid.

Reactants

Substances consumed in a chemical reaction.

Halogens

Group VIIA elements: F, Cl, Br, I