Suchergebnisse
Suchergebnisse:
Vor einem Tag · Die Stoffgruppe leitet sich vom Cyanwasserstoff (Blausäure, H–C≡N) ab. Ein Beispiel hierfür ist das Acetonitril, H 3 C–C≡N, bei dem R eine Methylgruppe ist. Nitrile sind polare Verbindungen und können eine Vielzahl von Reaktionen eingehen, weshalb sie eine große Bedeutung in der chemischen Synthese haben, auch im industriellen Bereich.
Vor 3 Tagen · In 1876, William Ramsay combined acetylene and hydrogen cyanide into pyridine in a red-hot iron-tube furnace. This was the first synthesis of a heteroaromatic compound. The first major synthesis of pyridine derivatives was described in 1881 by Arthur Rudolf Hantzsch.
- C₅H₅N
- 79.102 g·mol−1
- −41.63 °C (−42.93 °F; 231.52 K)
- Miscible
Vor einem Tag · By mass, polonium-210 is around 250,000 times more toxic than hydrogen cyanide (the LD 50 for 210 Po is less than 1 microgram for an average adult (see below) compared with about 250 milligrams for hydrogen cyanide). The main hazard is its intense radioactivity (as an alpha emitter), which makes it difficult to handle safely.
- α, β
- [209]
- silvery
Vor 2 Tagen · Solubility table. The table below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at one atmosphere pressure. Units of solubility are given in grams of substance per 100 millilitres of water (g/ (100 mL)), unless shown otherwise.
Vor 3 Tagen · Wasserstoff ist ein chemisches Element mit dem Symbol H (für lateinisch Hydrogenium „Wasserbildner“) und der Ordnungszahl 1. Im Periodensystem steht das Element Wasserstoff in der 1. Periode und in der 1. IUPAC-Gruppe .
Vor 2 Tagen · Key:RMRCNWBMXRMIRW-WYVZQNDMSA-L Y. Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. [2] It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. [3]
Vor 5 Tagen · The pH of a 0.100 M solution of hydrogen cyanide (HCN), where the acid dissociation constant (Ka) for HCN is 4.9 x 10^-9, is calculated to be approximately 2.71. This value is determined by using the formula for pH, which is -log10[H+], where [H+] is the hydrogen ion concentration. The hydrogen ion concentration is calculated using the formula ...
