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The material in a distillation apparatus that is collected in the receiver.

 

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Molecular Weight

The mass of one molecule of a nonionic substance in atomic mass units.

Lewis Acid

Any species that can accept a share in an electron pair.

Essential Oil

A plant extract that has a distinctive odour or flavour.

History of fireworks

There is an assumption that the history of fireworks started in China, about 2000 years ago. It is possible that the Chinese accidentally discovered explosions by burning bamboo canes.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.

 

Electroplating

Plating a metal onto a (cathodic) surface by electrolysis.

Dosimeter

A small, calibrated electroscope worn by laboratory personnel and designated to detect and measure incident ionizing radiation or chemical exposure.

Contact Process

Industrial process by which sulfur trioxide and sulfuric acid are produced from sulfur dioxide.

Chemistry of the sky

Chemistry can teach us about the composition of celestial bodies and determine their age.

Photochemical Smog

A brownish smog occurring in urban areas receiving large amounts of sunlight, caused by photochemical (light-induced) reactions among nitrogen oxides, hydrocarbons and other components of polluted air that produce photochemical oxidants.