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Vor 4 Tagen · In similar fashion, hemoglobin also has competitive binding affinity for cyanide (CN −), sulfur monoxide (SO), and sulfide (S 2−), including hydrogen sulfide (H 2 S). All of these bind to iron in heme without changing its oxidation state, but they nevertheless inhibit oxygen-binding, causing grave toxicity.
Vor 2 Tagen · Selenium is a chemical element; it has the symbol Se and atomic number 34. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. [9] It seldom occurs in its elemental state or as pure ore ...
Vor 2 Tagen · Mercury (element) rhombohedral ( hR1) Mercury is a chemical element; it has symbol Hg and atomic number 80. It is also known as quicksilver and was formerly named hydrargyrum ( / haɪˈdrɑːrdʒərəm / hy-DRAR-jər-əm) from the Greek words hydor (water) and argyros (silver). [8]
Vor einem Tag · acetyl chloride SOCl 2 acetic acid (i) Li[AlH 4], ether (ii) H 3 O + ethanol Two typical organic reactions of acetic acid Acetic acid undergoes the typical chemical reactions of a carboxylic acid. Upon treatment with a standard base, it converts to metal acetate and water. With strong bases (e.g., organolithium reagents), it can be doubly deprotonated to give LiCH 2 COOLi. Reduction of acetic ...
6. Mai 2024 · Cyanid (Kemisk formel: CN -) tilhører en gruppe af kvælende gifte, hvori også carbonmonoxid /kulilte og svovlbrinte findes. Fælles for stoffer i denne gruppe er deres evne til at forhindre transport af ilt til cellerne, for eksempel ved at konkurrere med ilt i hæmoglobin eller ved at gribe ind i transporten af ilt i de enkelte celler, som ...
Vor 4 Tagen · Hydrogen cyanide is a weak acid in aqueous solution with a pK a of about 9. In strongly alkaline solutions, above pH 11, say, it follows that sodium cyanide is "fully dissociated" so the hazard due to the hydrogen cyanide gas is much reduced. An acidic solution, on the other hand, is very hazardous because all the cyanide is in its acid form. Ingestion of cyanide by mouth is potentially fatal ...
14. Mai 2024 · Extraterrestrial atmosphere. Major features of the Solar System (not to scale) Graphs of escape velocity against surface temperature of some Solar System objects showing which gases are retained. The objects are drawn to scale, and their data points are at the black dots in the middle. The study of extraterrestrial atmospheres is an active ...
