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A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
Lieder eines fahrenden Gesellen (Songs of a Wayfarer) is a song cycle by Gustav Mahler on his own texts. The cycle of four lieder for medium voice (often performed by women as well as men) was written around 1884–85 in the wake of Mahler's unhappy love for soprano Johanna Richter, whom he met as the conductor of the opera house in Kassel, Germany, [1] and orchestrated and revised in the 1890s.
" Vom Himmel hoch, da komm ich her" ("From Heaven Above to Earth I Come") is a hymn text relating to the Nativity of Jesus, written by Martin Luther in 1534. The hymn is most often sung to the melody, Zahn No. 346, which first appeared in a 1539 songbook and was probably also composed by Luther.
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
We need to consider only the outer 3p 2 electrons, for which it can be shown (see term symbols) that the possible terms allowed by the Pauli exclusion principle are 1 D , 3 P , and 1 S. Hund's first rule now states that the ground state term is 3 P, which has S = 1. The superscript 3 is the value of the multiplicity = 2S + 1 = 3.
General chemistry (sometimes referred to as "gen chem") is offered by colleges and universities as an introductory level chemistry course usually taken by students during their first year. [1] The course is usually run with a concurrent lab section that gives students an opportunity to experience a laboratory environment and carry out ...
Brahms composed the two motets based on Biblical texts and chorales but without a liturgical occasion in mind. He first wrote O Heiland, reiß die Himmel auf as individual settings of the five stanzas of Friedrich von Spee's Advent song "O Heiland, reiß die Himmel auf", possibly in 1863/64. [2]
In chemistry, absolute configuration refers to the spatial arrangement of atoms within a molecular entity (or group) that is chiral, and its resultant stereochemical description. [1] Absolute configuration is typically relevant in organic molecules where carbon is bonded to four different substituents .