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Before the start of World War I, most ammonia was obtained by the dry distillation of nitrogenous vegetable and animal products; by the reduction of nitrous acid and nitrites with hydrogen; and also by the decomposition of ammonium salts by alkaline hydroxides or by quicklime, the salt most generally used being the chloride (sal-ammoniac).
In the 15th century, Basilius Valentinus showed that ammonia could be obtained by the action of alkalis on sal ammoniac. [61] At a later period, when sal ammoniac was obtained by distilling the hooves and horns of oxen and neutralizing the resulting carbonate with hydrochloric acid, the name 'spirit of hartshorn' was applied to ammonia. [21] [62]
Here are additional clues for each of the words in today's Mini Crossword. NYT Mini Across Hints 1 Across: Worked in Microsoft Word — HINT: It starts with the letter "T"
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Flask with smelling salts, used for reviving dental patients after a procedure. French, 18th century. Smelling salts have been used since Roman times and are mentioned in the writings of Pliny as Hammoniacus sal. [1]
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Vapor over anhydrous ammonia [5]; Temp. Pressure ρ of liquid : ρ of vapor : Δ vap H: −78 °C: 5.90 kPa: −75 °C: 7.93 kPa 0.73094 g/cm 3: 7.8241×10 −5 g/cm 3: −70 °C: 10.92 kPa 0.72527 g/cm 3
Ammonium carbonate is a chemical compound with the chemical formula [N H 4] 2 C O 3.It is an ammonium salt of carbonic acid.It is composed of ammonium cations [NH 4] + and carbonate anions CO 2− 3.
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