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Diborane(6), commonly known as diborane, is the chemical compound with the formula B 2 H 6.It is a highly toxic, colorless, and pyrophoric gas with a repulsively sweet odor. . Given its simple formula, borane is a fundamental boron compou
Molecular FeH can also be obtained (together with FeH 2 and other species) by vaporizing iron in an argon-hydrogen atmosphere and freezing the gas on a solid surface at about 10 K (-263 °C). The compound can be detected by infrared spectroscopy , and about half of it disappears when the sample is briefly warmed to 30 K. [ 15 ] A variant ...
iron tetracarbonyl hydride FeH 2 (CO) 4, the first such compound to be synthesised (1931). [6] FeH 2 (CO) 2 [P(OPh) 3] 2. Salts of the FeH 6 4− anion, such as magnesium iron hexahydride, Mg 2 FeH 6, produced by treating mixtures of magnesium and iron powders with high pressures of H 2. Di- and polyiron hydrides, e.g. [HFe 2 (CO) 8] − and ...
A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
Made in Japan, this was also the first calculator to use an LED display, the first hand-held calculator to use a single integrated circuit (then proclaimed as a "calculator on a chip"), the Mostek MK6010, and the first electronic calculator to run off replaceable batteries. Using four AA-size cells the LE-120A measures 4.9 by 2.8 by 0.9 inches ...
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Anhydrous ferric hydroxide occurs in the nature as the exceedingly rare mineral bernalite, Fe(OH) 3 ·nH 2 O (n = 0.0–0.25). [4] [5] Iron oxyhydroxides, FeOOH, are much more common and occur naturally as structurally different minerals (polymorphs) denoted by the Greek letters α, β, γ and δ.
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