Aniline (C₆H₅NH₂)

The simplest aromatic amine. Its scientific name is phenylamine.

Hydrogen bromide (HBr)

One of the hydrogen halides, it is used for the production of alkyl bromides.

Sulphur trioxide (SO₃)

One of the oxides of sulphur, forms sulphuric acid with water.

Hexane (C₆H₁₄)

The sixth member in the homologous series of straight-chain alkanes.

2-deoxy-beta-D-ribose (C₅H₁₀O₄)

A component of DNA, it contains one less hydroxyl group than β-D-ribose.

Life on the farm (Hungary)

Farming consists of special agricultural activities.

Types of farms and villages

The structure and density of farms and villages depend on the geographical features of the region.

Tennis court

Tennis is played on a court covered with grass, clay or synthetic material.

Molecule exercise V (Oxo compounds)

An exercise about the groups and structure of oxo compounds.

Pyridine (C₅H₅N)

A basic heterocyclic organic compound; a colourless, pungent toxic liquid.

Styrene (vinyl benzene) (C₈H₈)

A colourless liquid with an odour similar to benzene. The monomer of polystyrene.

Imidazole (C₃H₄N₂)

A biologically and practically important organic compound.

Clothing (Western Europe, 17th century)

Clothing reflects the lifestyle and culture of the region's inhabitants.

Chloromethane (methyl-chloride) (CH₃Cl)

Chloromethane can be prepared by heating a mixture of methane and chlorine.

Clothing (Western Europe, 16th century)

Clothing reflects the lifestyle and culture of the region's inhabitants.

Ethyl acetate (C₄H₈O₂)

One of the most important esters, produced by the reaction of ethanol and acetic acid.

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