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J-B Weld is a two-part epoxy adhesive (or filler) that can withstand high-temperature environments. J-B Weld can be used to bond surfaces made from metal, porcelain, ceramic, glass, marble, PVC, ABS, concrete, fiberglass, wood, fabric, or paper. [7][8] Alcohol should be avoided when cleaning surfaces, as it can degrade the bond. [9] J-B Weld is ...
An infrared spectroscopy correlation table (or table of infrared absorption frequencies) is a list of absorption peaks and frequencies, typically reported in wavenumber, for common types of molecular bonds and functional groups. [ 1 ][ 2 ] In physical and analytical chemistry, infrared spectroscopy (IR spectroscopy) is a technique used to ...
Solvent. Density (g cm-3) Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) K f (°C⋅kg/mol) Data source. Aniline. 184.3.
For seven decades, fluorosulfonic acid HSO 3 F and trifluoromethanesulfonic acid CF 3 SO 3 H were the strongest known acids that could be isolated as single compounds. Both are about a thousand times more acidic than pure sulfuric acid. In 2004, a boron compound broke this record by a thousand fold with the synthesis of carborane acid H(CHB 11 ...
Galvanic corrosion. Corrosion of an iron nail wrapped in bright copper wire, showing cathodic protection of copper; a ferroxyl indicator solution shows colored chemical indications of two types of ions diffusing through a moist agar medium. Galvanic corrosion (also called bimetallic corrosion or dissimilar metal corrosion) is an electrochemical ...
A symmetric hydrogen bond is a special type of hydrogen bond in which the proton is spaced exactly halfway between two identical atoms. The strength of the bond to each of those atoms is equal. It is an example of a three-center four-electron bond. This type of bond is much stronger than a "normal" hydrogen bond.
A metal ion in aqueous solution or aqua ion is a cation, dissolved in water, of chemical formula [M (H 2 O) n] z+. The solvation number, n, determined by a variety of experimental methods is 4 for Li + and Be 2+ and 6 for most elements in periods 3 and 4 of the periodic table. Lanthanide and actinide aqua ions have higher solvation numbers ...
The flame temperature of pure acetone is 1980 °C. [44] Like most ketones, acetone exhibits the keto–enol tautomerism in which the nominal keto structure (CH 3) 2 C=O of acetone itself is in equilibrium with the enol isomer (CH 3)C(OH)=(CH 2) (prop-1-en-2-ol). In acetone vapor at ambient temperature, only 2.4 × 10 −7 % of the molecules are ...