2023QS世界雇主声誉度排名发布!
选校,想必是最让准留学生们纠结的问题了。不过大家最关注的,就要数英国大学的综合排名和专业排名了。2023QS世界雇主声誉度排名已发布!在被广泛使用的QS排名里,“雇主声誉”是最富有特色的一项指标。 众所周知,...
选校,想必是最让准留学生们纠结的问题了。不过大家最关注的,就要数英国大学的综合排名和专业排名了。2023QS世界雇主声誉度排名已发布!在被广泛使用的QS排名里,“雇主声誉”是最富有特色的一项指标。 众所周知,...
Hydrolysis of Esters Hydrolysis of Esters - Acid The reverse of the esterification reaction is called hydrolysis Ester hydrolysis is a useful reaction for creating biodegradable plastics Est...
Reactions of Carboxylic Acids In aqueous solution they are only slightly ionised, to give low concentrations of hydronium ions and alkanoate ions (often called carboxylate ions) This partial...
Preparation of Carboxylic Acids Carboxylic acids are compounds with a -COOH functional group They can be prepared by a series of different reactions Oxidation of primary alcohols & aldeh...
Physical Properties of Carboxylic Acids Carboxylic acids Carboxylic acid is the name given to the family of compounds that contain the carboxyl functional group, -COOH The general formula of...
Reactions of Carbonyls Carbonyl compounds can undergo a number of reactions, some of which allow you to distinguish between an aldehyde and a ketone Oxidation - with acidified potassium dich...
Aldehydes & Ketones Aldehydes and ketones contain the carbonyl functional group, C=O This is why aldehydes and ketones are also known as carbonyls The difference between aldehydes and ke...
Optical isomers A carbon atom that has four different atoms or groups of atoms attached to it is called a chiral carbon or chiral centre Chira comes from a Greek word meaning hand, so we talk about...
9月19日,美国大学理事会College Board 宣布大陆2023年AP考试报名正式开启。在2022-23学年,大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。很多家长和学员询问应该报考什么科目?什么科目好学好...
9月19日,美国大学理事会College Board 宣布大陆2023年AP考试报名正式开启。在2022-23学年,大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。很多家长和学员询问应该报考什么科目?什么科目好学好...
9月19日,美国大学理事会College Board 宣布大陆2023年AP考试报名正式开启。在2022-23学年,大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。 美国大学先修课程(Advanced Placement),简称AP课程...
作为提交截止时间最晚的赛区,丘奖内地赛区的论文提交即将截止,剩余时间不足一周! 作为由数学大师丘成桐先生亲自发起设立的中学生科学创新类奖项,丘奖从十四年前单一的数学奖,发展到今天的数学奖、物理奖、化...
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