标化可选政策是否可行？2023美本申请季需要提交标化成绩吗？
随着留学申请人数的不断增加，竞争也愈发激烈，留学早已陷入内卷不停的怪圈之中，而标化考试绝对算得上是内卷重灾区。在疫情爆发的这两年，许多美国大学对标化的要求从“必须提交”改成“test-optional可选”或是“tes...
IB DP Chemistry: SL复习笔记1.2.8 Concentration Calculations
Concentration Calculations Step by step Concentration calculations involve bringing together the skills and knowledge you have acquired previously and applying them to problem solving You should be...
IB DP Chemistry: SL复习笔记1.2.7 Standard Solutions
Concentrations of Solutions Standard solutions Chemists routinely prepare solutions needed for analysis, whose concentrations are known precisely These solutions are termed standard solutions They ...
IB DP Chemistry: SL复习笔记1.2.6 Real Gases
Real Gas Behaviour The ideal gas equation does not fit all measurements and observations taken at all conditions with real gases The relationship between pressure, volume and temperature shows sign...
IB DP Chemistry: SL复习笔记1.2.5 Gas Law Relationships
Gas Law Relationships Gases in a container exert a pressure as the gas molecules are constantly colliding with the walls of the container Gas particles exert a pressure by constantly colliding with...
IB DP Chemistry: SL复习笔记1.2.4 The Ideal Gas Equation
Ideal Gas Equation Kinetic theory of gases The kinetic theory of gases states that molecules in gases are constantly moving The theory makes the following assumptions: The gas molecules are moving ...
IB DP Chemistry: SL复习笔记1.2.3 Avogadro's Law & Molar Gas Volume
Avogadro's Law Volumes of gases In 1811 the Italian scientist Amedeo Avogadro developed a theory about the volume of gases Avogadro’s law (also called Avogadro’s hypothesis) enables the mole ratio ...
IB DP Chemistry: SL复习笔记1.2.2 Reaction Yields
Reaction Yields Percentage yield In a lot of reactions, not all reactants react to form products which can be due to several factors: Other reactions take place simultaneously The reaction does not...
IB DP Chemistry: SL复习笔记1.2.1 Reacting Masses
Reacting Masses & Limiting Reactants The number of moles of a substance can be found by using the following equation: It is important to be clear about the type of particle you are referring to...
2023年英国留学一年需要花费多少？哪些方面开支比较大？
英国的教育以其超高的学术质量、一流的教学水平和优质的自然环境享誉世界，吸引全世界的学子目光，中国学生也不例外。据英国《卫报》最新数据显示，中国已成为英国最大留学生生源国。UCAS最新数据显示，今年申请...
IB DP Chemistry: SL复习笔记1.1.6 Empirical Formulae
Empirical & Molecular Formulae 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 C2H4O2 The empirical...
IB DP Chemistry: SL复习笔记1.1.5 Moles-Mass Problems
Moles, Particles & Masses Since atoms are so small, any sensible laboratory quantity of substance must contain a huge number of atoms Such numbers are not convenient to work with, so using mole...
