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  • 48139
  • NEWS
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    • Inorganic chemistry
    • Organic Chemistry
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  • FORUM
  • HANDBOOK
    • General Chemistry
      • The basic concepts of chemistry
      • Fundamentals of quantitative calculations in chemistry
      • Energy and direction of chemical reactions
      • Atomic Structure
      • Periodic Table of Elements
      • Chemical bond
      • Reactions Inorganic Chemistry. Electrolytic dissociation
      • Electrochemistry
      • Chemical equilibrium. The rate of chemical reactions
    • INORGANIC CHEMISTRY
      • The main classes of inorganic compounds
      • Hydrogen and its compounds
      • Elements of group IA: Li Na K Rb Cs Fr
      • Elements of group IIA: Be Mg Ca Sr Ba Ra
      • Elements of group IIIA: B Al Ga In Tl
      • Elements of group IVA: C Si Ge Sn Pb
      • Elements of group VA: N P As Sb Bi
      • Elements of group VIA: O S Se Te Po
      • Elements of group VIIA: F Cl Br I At
      • Elements of group VIIIA: He Ne Ar Kr Xe Rn
      • General characteristics of df-elements.
      • Elements of group IB: Cu Ag Au
      • Elements of group IIB: Zn Cd Hg
      • Elements of group IIIB: Sc Y
      • Lanthanides: La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
      • Actinides: Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
      • Elements of group IVB: Ti Zr Gf Rf
      • Elements of group VB: V Nb Ta Db
      • Elements of group VIB: Cr Mo W Sg
      • Elements of group VIIB: Mn Tc Re Bh
      • Elements of group VIIIB: Fe Co Ni Ru Rh Pd Os Ir Pt
    • ORGANIC CHEMISTRY
      • Theoretical Foundations of Organic Chemistry
      • Acyclic hydrocarbons
      • Rock-Oil
      • Coal
      • Acyclic oxygen-containing compounds
      • Acyclic halogenated compounds
      • Acyclic nitrogen-containing compound
      • Alicyclic sulfur-containing compound
      • Сarbohydrates
      • Alicyclic compound
      • Aromatic hydrocarbon
      • Heterocycles compounds
      • Bio-chemicals substances Classes
      • Special purpose Orhanycheskye substance
      • Polymers
    • Chemistry reference tables
      • Periodic Table of Elements
      • Relative molecular mass (chemical calculator)
      • Thermodynamic quantities of simple and complex substances
      • Density of water solutions
  • TASKS
    • Solved
    • Solve
  • BOOKS
    • General chemistry
    • Inorganic chemistry
    • Organic chemistry
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    Refining Avogadro’s number on way to new kilo.

    22.07.2015
  • techemy.com news

    Technical work on techemy.com

    03.07.2015

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Technical work on techemy.com
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Technical work on techemy.com

On 03.07.2015 by Techemy

On 03.07.2015 held engineering works to replace the code of the site. Due to technical works may not be available, or some features of the site page. Completion is scheduled for 09.01.2015.

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  • Refining Avogadro’s number on way to new kilo.

    Refining Avogadro’s number on way to new kilo.

    22.07.2015

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