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Hydrogen bromide (HBr)

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

Hungarian army in the 15th century (infantry)

One of the main units of Matthias Corvinus´ Black Army was the infantry.

Topographic map of Hungary

This animation demonstrates the geographical regions of Hungary.

Hungarian hussar

The term ´hussar´ refers to a type of light cavalry which originated in Hungary and was the most popular in the 18th–19th centuries.

Volume of spheres (demonstration)

The sum of the volume of the ´tetrahedrons´ gives an approximation of the volume of the sphere.

Designing kitchen furniture - spatial coordinate system

Practising the use of the spatial coordinate system with the help of a computer-designed kitchen model.

Cuboid (exercises)

Edges, diagonals and faces of a cuboid can be identified by its vertices.

Views

Pick the shape that is shown in different views below.

Helicopter experiment (Oszkár Asboth, 1928)

As a milestone in the history of aviation, Oszkár Asboth´s first helicopter made its first flight in 1928.

Net of a cube (exercises)

Not all nets consisting of 6 congruent squares are foldable into cubes.

2-deoxy-beta-D-ribose (C₅H₁₀O₄)

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

Hexane (C₆H₁₄)

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

Sulphur trioxide (SO₃)

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

Acetaldehyde (ethanal) (CH₃CHO)

An aldehyde which is an important raw material and intermediate product in industry.

Styrene (vinyl benzene) (C₈H₈)

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

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