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Quizlet made its first acquisition in March 2021, with the purchase of Slader, which offered detailed explanations of textbook concepts and practice problems, and eventually incorporated it into its paid platform, Quizlet Plus. [20] [21] [22] In November 2022, Quizlet announced a new CEO, Lex Bayer, the former CEO of Starship Technologies. [23]
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 ...
Malacia is abnormal softening of a biological tissue, most often cartilage.The word is derived from Greek μαλακός, malakos = soft. Usually the combining form-malacia suffixed to another combining form that denotes the affected tissue assigns a more specific name to each such disorder, as follows:
An example is The preferred CRU is an acyclic subunit of 4 carbon atoms with 4 free valences, one at each atom, as shown. It is oriented so that the lower left atom has the lowest number. The free-valence locants are written before the suffix, and they are cited clockwise from the lower left position as: lower-left, upper-left:upper-right ...
Anterior staphyloma after fungal corneal ulcer. In the anterior segment of the eye, involving the cornea and the nearby sclera.It is an ectasia and outpouching of the pseudocornea ( the scar formed from organised exudates and fibrous tissue covered with epithelium over the iris) which results after total sloughing of cornea in sloughening corneal ulcer with iris plastered behind; the ...
The Sijil Pelajaran Malaysia (SPM), or the Malaysian Certificate of Education, is a national examination sat for by all Form 5 secondary school students in Malaysia.It is the equivalent of the General Certificate of Secondary Education (GCSE) of England, Wales and Northern Ireland; the Nationals 4/5 of Scotland; and the GCE Ordinary Level (O Level) of the Commonwealth of Nations.
In chemistry, molality is a measure of the amount of solute in a solution relative to a given mass of solvent. This contrasts with the definition of molarity which is based on a given volume of solution. A commonly used unit for molality is the moles per kilogram (mol/kg). A solution of concentration 1 mol/kg is also sometimes denoted as 1 molal.
The chemical reactions of dimethylacetamide are typical of N,N-disubstituted amides. Hydrolysis of the acyl-N bond occurs in the presence of acids: . CH 3 CON(CH 3) 2 + H 2 O + HCl → CH 3 COOH + (CH 3) 2 NH 2 + Cl −