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...
IB DP Chemistry: HL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: HL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...
IB DP Chemistry: HL复习笔记1.1.4 The Mole Concept
The Mole The Avogadro constant (NA or L) is the number of particles equivalent to the relative atomic mass or molecular mass of a substance in grams The Avogadro constant applies to atoms, molecule...
IB DP Chemistry: HL复习笔记1.1.3 State Changes
State Changes Changes of state are physical changes that are reversible These changes do not change the chemical properties or chemical makeup of the substances involved Vaporization includes evapo...
IB DP Chemistry: HL复习笔记1.1.2 Equations
Balancing 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 products A word equat...
IB DP Chemistry: HL复习笔记1.1.1 Elements, Compounds & Mixtures
Elements & Compounds Elements are substances made from one kind of atom Compounds are made from two or more elements chemically combined Elements take part in chemical reactions in which new su...
IB DP Biology: HL复习笔记11.4.7 Skills: Annotating Sexual Reproduction Diagrams
Annotating the Seminiferous Tubule and Ovary Annotating the Seminiferous Tubule The testes contain many small tubes, or tubules, known as seminiferous tubules The production of sperm, or spermatoge...
