2022-2023年AMC中国区报名已开启，AMC考试技巧和难度分布解析！
近几年来，美本竞争不断白热化，SAT/ACT、托福、GPA这些标化成绩已经很难让同学们在庞大的留学生群体中脱颖而出。这个时候，就需要一些活动学术活动来帮助同学们提升“软背景”，提高申请竞争力。今天要介绍的美国A...
2022年AMC10/12报名已开启！内附AMC详细报名指南！
在众多的国际思维挑战活动当中，美国AMC数学近年来可以说是火爆全球，成为名校申请的敲门砖！近日，中国区2022-2023学年AMC10/12活动已全面开启报名！ AMC学术活动报名方式 两种报名方式如下： AMC中国区组委会 ...
Edexcel A Level Chemistry:复习笔记7.5.7 Amino Acids & Proteins
Properties of 2-Amino Acids Acid / base properties of amino acids Amino acids will undergo most reactions of amines and carboxylic acids including acid-base reactions of: Amines with acids C...
Edexcel A Level Chemistry:复习笔记7.5.6 Condensation Polymerisation
Condensation Polymers Condensation polymerisation is another type of reaction whereby a polymer is produced by repeated condensation reactions between monomers Natural condensation polymers ...
Edexcel A Level Chemistry:复习笔记7.5.5 Amide Chemistry
Amide Formation Amides are organic compounds with an -CONR2 functional group They can be prepared from the condensation reaction between an acyl chloride and ammonia or amine In a condensati...
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Edexcel A Level Chemistry:复习笔记7.5.4 Aromatic Amine Formation
Aromatic Amine Formation Phenylamine is an organic compound consisting of a benzene ring and an amine (NH2) functional group Phenylamine is sometimes known as aminobenzene and aniline Nitrob...
Edexcel A Level Chemistry:复习笔记7.5.3 Amine Basicity
Amine Basicity The nitrogen atom in ammonia and amine molecules can accept a proton (H+ ion) They can therefore act as Bronsted-Lowry bases in aqueous solutions by donating its lone pair of ...
Edexcel A Level Chemistry:复习笔记7.5.2 Primary Aliphatic Amines
Reactions of Primary Aliphatic Amines Reactions with water The first few members of the homologous series of primary aliphatic amines are miscible with water However as the hydrocarbon part ...
