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11 hours ago · Etymology Pliny, in Book XXXI of his Natural History, refers to a salt named hammoniacum, so called because of the proximity of its source to the Temple of Jupiter Amun (Greek Ἄμμων Ammon) in the Roman province of Cyrenaica. However, the description Pliny gives of the salt does not conform to the properties of ammonium chloride. According to Herbert Hoover's commentary in his English ...
- NH₃
- 47% w/w (0 °C), 31% w/w (25 °C), 18% w/w (50 °C)
- 17.031 g·mol−1
- −77.73 °C (−107.91 °F; 195.42 K) (Triple point at 6.060 kPa, 195.4 K)
11 hours ago · Universities use 0–100 point grade scaling similar to the United States grading. 71 is required to pass, or roughly the equivalent of a C. Schools use the 1–5 point system, meaning if a student has a 4.5 that is the equivalent of an A− or somewhere around the 95-point range.
