Disclaimer - please read Svibanj 14, 2021, 11:12:43
knowledge database chemical database synthesis database razno forum

     

znanstvenik

Knowledge database: Basics: Density

Density is defined as the mass per unit volume of a particular sample. It is marked with the Greek letter ρ (rho). Density depends on several factors, such as temperature, pressure, crystal structure, etc. Solids and liquids behave relatively similar, while gas density is considerably influenced by pressure. Density usually drops when the temperature is increased. In addition, the solid state of a substance, usually has a higher density than the liquid state of the same substance. This is not true only in the case of water, in which the ice as a solid state has a lower density than liquid water. Water has a maximum density at 4 °C.

The densest element currently known is osmium. A small cube with a 1 cm edge length weighs 22.6 grams. On the other hand, one of the materials with the lowest density is aerogel. A cube of the same size, weighs about 0.001 to 0.002 grams.

chemistry tutorials - density

The range of density values in the PTE.

 

Basics
   About chemistry
   Periodic table of elements
   Atoms and molecules
   Types of matter
   Physical / chemical properties
   States of matter
   Melting and boiling point
   Density
   Separation methods
   Electrons
   Oxidation states
   Ionization energy
   Electron affinity
   Electronegativity
   Chemical bonds

Basic laws of chemistry

Stoichiometry

Chemical reactions

Chemical equilibrium