疫情下中国学生IBDP大考成绩有何变化？
疫情下中国学生IB DP大考成绩有何变化？ 近日，IBO官网公布了全球173878名学生在今年5月份进行的IB考试成绩，这其中包含IBDP（高中文凭课程）和IBCP（职业教育）两种课程。资料显示，今年IB DP全球平均分31.98分...
IB DP Chemistry: HL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: HL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: HL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: HL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: HL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: HL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: HL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: HL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...
