Senators, being members of the highest social class of ancient Rome, wore togas with...
It is also used as a food additive, limescale and rust remover.
An exercise about the groups and structure of organic nitrogen compounds.
A colourless, toxic gas with the characteristic odour of rotten eggs. It occurs in...
A reddish-brown toxic gas, very reactive due to its unpaired electron.
The simplest aromatic amine. Its scientific name is phenylamine.
An allotrope of oxygen, consisting of 3 oxygen atoms.
A component of DNA, it contains one less hydroxyl group than β-D-ribose.
The sixth member in the homologous series of straight-chain alkanes.
One of the oxides of sulphur, forms sulphuric acid with water.
One of the hydrogen halides, it is used for the production of alkyl bromides.
Find present-day countries related to notable historical personalities.
The Athenian democracy was built on the community of citizens with full rights.
Edges, diagonals and faces of a cuboid can be identified by its vertices.
The sum of the volume of the ´tetrahedrons´ gives an approximation of the volume of the...
Practising the use of the spatial coordinate system with the help of a computer-designed...
The first paddle steamer in Hungary entered service in 1846.
Pick the shape that is shown in different views below.
A liquid with a characteristic unpleasant odour and a low boiling point.
The first member of the homologous series of alkyne hydrocarbons.