Chapter 3: Mole Concept, Chemical Formulae and Equations
What you need to learn in this chapter
In this chapter, we will be learning about the concepts of relative atomic mass and relative molecular mass. We will understand how these concepts are based on the carbon-12 scale and learn how to calculate them.
Next, we will dive into the mole concept, defining what a mole is and how it relates to the Avogadro constant, number of particles, and number of moles.
Moving on, we will explore chemical formulae, including the meaning of chemical formula, empirical formula, and molecular formula. Through activities, we will determine the empirical formula of magnesium oxide (MgO).
Lastly, we will learn how to write balanced chemical equations and interpret them qualitatively and quantitatively.
Topics in this chapter
1. Relative Atomic Mass and Relative Molecular Mass
What you will learn in this topic
- Conceptualising relative atomic mass and relative molecular mass based on carbon-12 scale
- Calculating relative molecular mass and relative formula mass
2. Mole Concepts
What you will learn in this topic
- Defining mole
- Relating Avogadro constant, NA, number of particles and number of moles
- Stating the meaning of molar mass
- Relating molar mass, mass and number of mole
- Stating the meaning of molar volume
- Relating molar volume, volume of gas and number of mole
- Solving numerical problems involving number of particles, number of mole, mass of substances and volume of gas
3. Chemical Formulae
What you will learn in this topic
- Stating the meaning of chemical formula, empirical formula and molecular formula
- Determining the empirical formula of magnesium oxide (MgO) through activities
- Determining the empirical formula of copper (II) oxide (CuO) through activities
- Solving numerical problems involving empirical formula and molecular formula
- Developing chemical formulae for compounds
4. Chemical Equations
What you will learn in this topic
- Writing balanced chemical equations
- Interpreting chemical equations qualitatively and quantitatively
- Solving stoichiometric numerical problems
Live Tuition Recordings
Treat yourself with rewards for your hard work
Learn more »