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Hace 2 días · Permian–Triassic boundary at Frazer Beach in New South Wales, with the End Permian extinction event located just above the coal layer. Approximately 251.9 million years ago, the Permian–Triassic (P–T, P–Tr) extinction event (PTME; also known as the Late Permian extinction event, the Latest Permian extinction event, the End-Permian extinction event, and colloquially as the Great Dying ...
Hace 20 horas · Potassium permanganate is an inorganic compound with the chemical formula KMnO 4. It is a purplish-black crystalline salt, that dissolves in water as K + and MnO−. 4, an intensely pink to purple solution.
- KMnO₄
- 158.034 g/mol
- 240 °C (464 °F; 513 K) (decomposes)
- 76 g/L (25 °C), 250 g/L (65 °C)
Hace 3 días · The U.S. labor certification process, also known as the PERM (Program Electronic Review Management) process, is a crucial step in obtaining certain employment-based immigrant visas and lawful permanent residence in the United States.
Hace 3 días · The fence at the old Gulag camp in Perm-36, founded in 1943, turned into a museum. Many Ukrainian nationalists were repressed and held at this camp. Although the term Gulag was originally used in reference to a government agency, in English and many other languages, the acronym acquired the qualities of a common noun, denoting the ...
Hace 1 día · A perm is a chemical treatment designed to restructure the natural curl pattern of your hair. It can add body and texture, making even the most limp locks appear full and bouncy. Perms last for several months and can be used to create curls, waves or other shapes in the hair. How is a Perm Done?
Hace 3 días · This article covers the top 10 frequently asked questions about the PERM labor certification process. We review the process, including the employer's role, prevailing wage determination, recruitment steps, potential denial reasons, and next steps after approval.
Hace 3 días · This list contains the 138 United Nations member states so far elected to the United Nations Security Council, including the five permanent members, all listed by number of years each country has so far spent on the UNSC. Of all the members, 6 have so far ceased to exist, leaving the list with 132 modern nations.
