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...
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...
IB DP Chemistry: SL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: SL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: SL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: SL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: SL复习笔记6.6.6 Skills: Reproduction Diagrams
Male & Female Diagrams You should be able to?annotate diagrams?of the female and male?reproductive systems?to show the names of the different?structures You should also be able to recall the?fu...
IB DP Biology: SL复习笔记6.6.5 Reproduction: Sex Determination in Females
Oestrogen & Progesterone During early development an embryo develops?embryonic?gonads?that will either become?ovaries?in females or?testes?in males The factor that determines whether the embryo...
