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Molar volume vs. pressure for α iron at room temperature. ... (14 alpha particles) ... It is used to fortify foods and treat iron deficiency anemia.
Iron allotropes, showing the differences in structure. The alpha iron (α-Fe) is a body-centered cubic (BCC) and the gamma iron (γ-Fe) is a face-centered cubic (FCC). At atmospheric pressure, three allotropic forms of iron exist, depending on temperature: alpha iron (α-Fe, ferrite), gamma iron (γ-Fe, austenite), and delta iron (δ-Fe).
English: Molar volume as function of pressure for alpha-iron at room temperature. Experimental data (N=95) are from Basinski et al. (1955, Proc. R. Soc. Experimental data (N=95) are from Basinski et al. (1955, Proc. R. Soc.
For women ages 19 to 50, that works out to about 32 mg of iron per day. The 25 delicious foods on this list, which pack more iron than a serving of beef, can help you hit your daily mark.
Note that the especially high molar values, as for paraffin, gasoline, water and ammonia, result from calculating specific heats in terms of moles of molecules. If specific heat is expressed per mole of atoms for these substances, none of the constant-volume values exceed, to any large extent, the theoretical Dulong–Petit limit of 25 J⋅mol ...
Absorption of dietary iron in iron salt form (as in most supplements) varies somewhat according to the body's need for iron, and is usually between 10% and 20% of iron intake. Absorption of iron from animal products, and some plant products, is in the form of heme iron, and is more efficient, allowing absorption of from 15% to 35% of intake.
The following molar volumes and densities for the majority of the gaseous elements were calculated from the van der Waals equation of state, using the quoted values of the van der Waals constants. The source for the van der Waals constants and for the literature densities was: R. C. Weast (Ed.), Handbook of Chemistry and Physics (53rd Edn ...
The 16-person journey mounted in September 2023 from Tarawa, Kirbati, a port near Howland Island, and the team’s unmanned submersible scanned 5,200 square miles of ocean floor.