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Nickel sulfate hexahydrate under a microscope. At least seven sulfate salts of nickel(II) are known. These salts differ in terms of their hydration or crystal habit.. The common tetragonal hexahydrate crystallizes from aqueous solution between 30.7 and 53.8 °C.
Silicon nitride is a chemical compound of the elements silicon and nitrogen. Si 3 N 4 (Trisilicon tetranitride) is the most thermodynamically stable and commercially important of the silicon nitrides, [6] and the term ″Silicon nitride″ commonly refers to this specific composition.
The geometry of the nickel(II) ion is square planar. [2] It is surrounded by two equivalents of the conjugate base (dmgH −) of dimethylglyoxime (dmgH 2).The pair of organic ligands are joined through hydrogen bonds to give a macrocyclic ligand.
Molar mass: 90.7584 g mol −1 Appearance black solid Odor: Odorless Density: 5.87 g/cm 3: Melting point: 797 °C (1,467 °F; 1,070 K) Boiling point:
The molar mass of atoms of an element is given by the relative atomic mass of the element multiplied by the molar mass constant, M u ≈ 1.000 000 × 10 −3 kg/mol ≈ 1 g/mol. For normal samples from Earth with typical isotope composition, the atomic weight can be approximated by the standard atomic weight [ 2 ] or the conventional atomic weight.
The molar mass of a substance depends not only on its molecular formula, but also on the distribution of isotopes of each chemical element present in it. For example, the molar mass of calcium-40 is 39.962 590 98 (22) g/mol, whereas the molar mass of calcium-42 is 41.958 618 01 (27) g/mol, and of calcium with the normal isotopic mix is 40.078(4 ...
Molar mass: 56.0268 Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references
Molar mass: 46.005 g·mol −1 Conjugate acid: Nitrous acid: Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F ...