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A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
Isoprenes in animals form the important steroid structural (cholesterol) and steroid hormone compounds; and in plants form terpenes, terpenoids, some alkaloids, and a class of hydrocarbons called biopolymer polyisoprenoids present in the latex of various species of plants, which is the basis for making rubber. Biologists usually classify the ...
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In the fossil fuel industries, hydrocarbon refers to naturally occurring petroleum, natural gas and coal, or their hydrocarbon derivatives and purified forms. Combustion of hydrocarbons is the main source of the world's energy. Petroleum is the dominant raw-material source for organic commodity chemicals such as solvents and polymers.
The secondary functional groups are: a hydroxy- at carbon 5, a chloro- at carbon 11, a methoxy- at carbon 15, and a bromo- at carbon 18. Grouped with the side chains, this gives 18-bromo-12-butyl-11-chloro-4,8-diethyl-5-hydroxy-15-methoxy. There are two double bonds: one between carbons 6 and 7, and one between carbons 13 and 14.
Alkenes cause instability of hydrocarbon fuels. [9] Fluid catalytic cracking is a commonly used process, and a modern oil refinery will typically include a cat cracker, particularly at refineries in the US, due to the high demand for gasoline. [10] [11] [12] The process was first used around 1942 and employs a powdered catalyst. During WWII ...
Sean “Diddy” Combs has been accused of sexual battery by a woman who claims that in September 2016 the music producer dangled her from a 17-story balcony as others were on site, including his ...
1.122 064 990 122 11 × 10 37: C 82 H 166: n-dooctacontane 83 2.150 278 094 747 97 × 10 32: 3.578 584 997 560 67 × 10 37: C 83 H 168: n-trioctacontane 84 5.875 317 238 265 77 × 10 32: 1.141 724 657 744 27 × 10 38: C 84 H 170: n-tetraoctacontane 85 1.605 913 778 494 71 × 10 33: 3.643 883 155 873 11 × 10 38: C 85 H 172: n-pentaoctacontane ...