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The self-ionization of water (also autoionization of water, autoprotolysis of water, autodissociation of water, or simply dissociation of water) is an ionization reaction in pure water or in an aqueous solution, in which a water molecule, H 2 O, deprotonates (loses the nucleus of one of its hydrogen atoms) to become a hydroxide ion, OH −.
The refractive index of liquid water (1.333 at 20 °C (68 °F)) is much higher than that of air (1.0), similar to those of alkanes and ethanol, but lower than those of glycerol (1.473), benzene (1.501), carbon disulfide (1.627), and common types of glass (1.4 to 1.6). The refraction index of ice (1.31) is lower than that of liquid water.
The PRDOE is the state education agency in charge of managing public schools in Puerto Rico as well as the island's education system and curricula. [1] The department, headquartered in Hato Rey , San Juan , [ 2 ] is the result of a United States state department of education .
Laberinto Cromovegetal (1995) by Carlos Cruz-Diez, an iconic work of gardening art. The Simón Bolívar University (Universidad Simón Bolívar in Spanish) or USB, is a public institution divided in two branches, one in Miranda state and one in Vargas state, with scientific and technological orientation.
An email inbox containing a large amount of spam messages. Spamming is the use of messaging systems to send multiple unsolicited messages (spam) to large numbers of recipients for the purpose of commercial advertising, non-commercial proselytizing, or any prohibited purpose (especially phishing), or simply repeatedly sending the same message to the same user.