2022年IG化学部分真题解析！
截至目前，2022年夏季大考的成绩都出来了。根据Ofqual官方数据，今年参加IGCSE/GCSE考试的同学又有所增加，共有5349250人报名参加GCSE夏季大考。 2022年IGCSE整体成绩趋势 今年整体成绩要比去年低。回想过去两年...
Edexcel A Level Chemistry:复习笔记1.7.1 Reacting Volume Calculations
Reacting Volume Calculations Reacting volume calculations are commonly associated with the reactions of gases All gases occupy the same volume under the same conditions At room temperature a...
Edexcel A Level Chemistry:复习笔记1.6.5 Amount of Substance Calculations
Amount of Substance Calculations As previously discussed, the amount of substance can be defined as the number of particles in a substance, n, measured in moles (often abbreviated to mol) In...
Edexcel A Level Chemistry:复习笔记1.6.4 The Mole & the Avogadro Constant
The Mole & Avogadro The Avogadro constant (NA or L) is the number of particles equivalent to the relative atomic mass or molecular mass of a substance The Avogadro constant applies to at...
Edexcel A Level Chemistry:复习笔记1.6.3 Applying Equations
Relating Observations to Chemical Equations Chemical equations give information about the reaction that is taking place Balanced equations show the number of particles participating in the r...
Edexcel A Level Chemistry:复习笔记1.6.2 Balanced Equations
Writing Balanced Equations A symbol equation is a shorthand way of describing a chemical reaction using chemical symbols to show the number and type of each atom in the reactants and product...
Edexcel A Level Chemistry:复习笔记1.6.1 Empirical & Molecular Formulae
Empirical & Molecular Formula Definitions The molecular formula is the formula that shows the number and type of each atom in a molecule E.g. the molecular formula of ethanoic acid is C2...
Edexcel A Level Chemistry:复习笔记1.5.8 Predicting Structures
Predicting Structure & Bonding Different types of structure and bonding have different effects on the physical properties of substances such as their melting and boiling points, electric...
Edexcel A Level Chemistry:复习笔记1.5.7 Covalent Structures
Simple Molecular Compounds Simple Molecular Compounds Covalent substances tend to have small molecular structures, such as Cl2, H2O or CO2 These small molecules are known as simple molecules...
