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The crystal structure of the dihydrate was partially determined in 1927 by Hendricks and Dickinson [1] [4] and refined in 1934 by Chrobak. [5] The structure is tetragonal P4 2 /mnm (136), Z=2, isostructural with ammonium tetrachoridocuprate(II) (NH 4) 2 CuCl 4 ·2 H 2 O and rubidium tetrachoridocuprate(II) Rb 2 CuCl 4 ·2 H 2 O.
(b) The top shows both the dot-and-cross diagram and the simplified diagram of the LDQ structure of the NO radical. Below is shown the dimerisation reaction of the NO monomer into the N 2 O 2 dimer. Hence, the dimerisation of CN to cyanogen is favourable as it increases the degree of bonding in the overall system and reduces the total energy.
Own work based on: File:Flammability diagram methane.png Redrawing of original by Power.corrupts as vector graphic. Possible source: Mashuga, CV; Crowl DA (1998). "Application of the flammability diagram for evaluation of fire and explosion hazards of flammable vapors". Process Safety Progress. 17 (3): 176–183. Author
2 CuCl 2 → 2 CuCl + Cl 2 The reported melting point of copper(II) chloride of 498 °C (928 °F) is a melt of a mixture of copper(I) chloride and copper(II) chloride. The true melting point of 630 °C (1,166 °F) can be extrapolated by using the melting points of the mixtures of CuCl and CuCl 2 .
[1] [2] [3] Introduced by Gilbert N. Lewis in his 1916 article The Atom and the Molecule, a Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. [4] Lewis structures extend the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.
Download QR code; Print/export Download as PDF; Printable version; In other projects Appearance. ... [CuCl4]2- Source Author Date 9/9/09 Author s4wilson Permission
1.1 kJ/mol Std entropy change of fusion, Δ fus S o: 12.1 J/(mol·K) Std enthalpy change of vaporization, Δ vap H o: 8.17 kJ/mol Std entropy change of vaporization, Δ vap S o? J/(mol·K) Solid properties Std enthalpy change of formation, Δ f H o solid? kJ/mol Standard molar entropy, S o solid? J/(mol K) Heat capacity, c p? J/(mol K) Liquid ...
Any mixture of methane and air will therefore lie on the straight line between pure methane and pure air – this is shown as the blue air-line. The upper and lower flammability limits of methane in air are located on this line, as shown (labelled UEL and LEL, respectively). The stoichiometric combustion of methane is: CH 4 + 2O 2 → CO 2 + 2H ...