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Boron trioxide or diboron trioxide is the oxide of boron with the formula B 2 O 3.It is a colorless transparent solid, almost always glassy (amorphous), which can be crystallized only with great difficulty.
Standard molar entropy, S o solid: 54.0 J/(mol K) Heat capacity, c p: 62.8 J/(mol K) Liquid properties Std enthalpy change of formation, Δ f H o liquid? kJ/mol Standard molar entropy, S o liquid? J/(mol K) Heat capacity, c p? J/(mol K) Gas properties Std enthalpy change of formation, Δ f H o gas-843.8 kJ/mol Standard molar entropy, S o gas ...
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.
Molar mass of glass component, g/mol Batch component Formula of batch component Molar mass of batch component, g/mol SiO 2: 67 60.0843 Sand SiO 2: 60.0843 Na 2 O 12 61.9789 Trona: Na 3 H(CO 3) 2 *2H 2 O 226.0262 CaO 10 56.0774 Lime CaCO 3: 100.0872 Al 2 O 3: 5 101.9613 Albite: Na 2 O*Al 2 O 3 *6SiO 2: 524.4460 K 2 O 1 94.1960 Orthoclase: K 2 O ...
Molar mass: 122.22 g/mol Appearance White crystals Odor: bitter, chocolate-like or burnt rubber [1] Density: 0.94 g/cm 3 [1] Melting point: 97–98 °C (207–208 °F; 370–371 K) Boiling point: 213 °C (415 °F; 486 K) Solubility in other solvents Slightly, in cold water. Vapor pressure: 0.2 mmHg [1] Hazards Occupational safety and health ...
Like many boron hydride clusters, pentaborane(11) was originally obtained from the pyrolysis of diborane.A more systematic synthesis entails treatment of [B 4 H 9] − with boron tribromide.
Boron monoxide (BO) is a binary compound of boron and oxygen. It has a molar mass of 26.81 g/mol. The material was first reported in 1940, [1] with a modified synthetic procedure published in 1955, [2] however, the material's structure had remained unknown for nearly a century.
Bismuth(III) oxide is a compound of bismuth, and a common starting point for bismuth chemistry.It is found naturally as the mineral bismite (monoclinic) and sphaerobismoite (tetragonal, much more rare), but it is usually obtained as a by-product of the smelting of copper and lead ores.