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Unlike for 27 Al, hydrogen burning is the primary source of 26 Al, with the nuclide emerging after a nucleus of 25 Mg catches a free proton. However, the trace quantities of 26 Al that do exist are the most common gamma ray emitter in the interstellar gas; [63] if the original 26 Al were still present, gamma ray maps of the Milky Way would be ...
The molecular mass and relative molecular mass are distinct from but related to the molar mass. The molar mass is defined as the mass of a given substance divided by the amount of the substance , and is expressed in grams per mol (g/mol).
The molecular mass (for molecular compounds) and formula mass (for non-molecular compounds, such as ionic salts) are commonly used as synonyms of molar mass, differing only in units (daltons vs g/mol); however, the most authoritative sources define it differently. The difference is that molecular mass is the mass of one specific particle or ...
Al 2 O 3: Molar mass: 101.960 g·mol −1 Appearance white solid Odor: odorless ... is a chemical compound of aluminium and oxygen with the chemical formula Al 2 O 3.
The decay level scheme for 26 Al and 26m Al to 26 Mg. [8] [10]Cosmogenic aluminium-26 was first described in studies of the Moon and meteorites. Meteorite fragments, after departure from their parent bodies, are exposed to intense cosmic-ray bombardment during their travel through space, causing substantial 26 Al production.
Al(OH) 3 Molar mass: 78.003 g·mol −1 Appearance White amorphous powder Density: 2.42 g/cm 3, solid ... An additional 122 sought treatment for chemical burns.
The atomicity of homonuclear molecule can be derived by dividing the molecular weight by the atomic weight. For example, the molecular weight of oxygen is 31.999, [3] while its atomic weight is 15.879; [4] therefore, its atomicity is approximately 2 (31.999/15.879 ≈ 2).
Aluminium sulfate is rarely, if ever, encountered as the anhydrous salt. It forms a number of different hydrates, of which the hexadecahydrate Al 2 (SO 4) 3 ·16H 2 O and octadecahydrate Al 2 (SO 4) 3 ·18H 2 O are the most common. The heptadecahydrate, whose formula can be written as [Al(H 2 O) 6] 2 (SO 4) 3 ·5H 2 O, occurs naturally as the ...