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The purplish-black color of solid potassium permanganate, and the intensely pink to purple color of its solutions, is caused by its permanganate anion, which gets its color from a strong charge-transfer absorption band caused by excitation of electrons from oxo ligand orbitals to empty orbitals of the manganese(VII) center.
Potassium permanganate (KMnO 4) is a dark violet colored powder. Its reaction with glycerol (commonly known as glycerin or glycerine) (C 3 H 5 (OH) 3) is highly exothermic, resulting rapidly in a flame, along with the formation of carbon dioxide and water vapour:
The 2020 Summer Olympics, officially known as the Games of the XXXII Olympiad, were an international multi-sport event held in Tokyo, Japan, from 23 July to 8 August 2021. The Games were postponed by one year as part of the impact of the COVID-19 pandemic on sports. [2]
From the point of view of Western history of chemistry, hydrochloric acid was the last of the three well-known mineral acids for which the method of its production appeared in the literature. [20] Recipes for its production started to appear in the late sixteenth century.
2021 Summer International: Win England: Lewis Ludlow: 3rd — [30] [31] 10 July Canada: Twickenham Stadium, London 70 14 Win England: 3rd — [32] [33] 6 November Tonga: Twickenham Stadium, London 69 3 2021 Autumn International: Win England: Courtney Lawes: 4th — [34] [35] 13 November Australia: Twickenham Stadium, London 32 15 Win England ...
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Field hockey was a sport at the 2020 Summer Olympics in Tokyo which took place from 24 July to 6 August 2021 at the Oi Seaside Park. Twenty-four teams (twelve each for men and women) competed in the tournament. [1] It was originally scheduled to be held in 2020, but on 24 March 2020, the Olympics were postponed to 2021 due to the COVID-19 ...
The men's individual road race event at the 2020 Summer Olympics took place on 24 July 2021 on a course starting at Musashinonomori Park in Tokyo, and ending at the Fuji Speedway in Shizuoka Prefecture. [1] 128 cyclists from 57 nations competed, [2] with 85 completing the course. The race was won by Richard Carapaz of Ecuador.