Learning Paths
Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chapter 1Contains Standard content
Stoichiometry and Concentration, Measurement, Units and Significant Figures, Laws of Chemical Combination, The Mole Concept, Molecules, Ions and Formulae, Elements, Compounds and Changes
How many molecules are in a sip of water? How much oxygen does a gas burner need? Chemistry answers such questions by counting particles in a clever way, with the mole. In this chapter you learn to measure carefully and to report a measurement honestly, meet the laws that led to the idea of atoms, and then use moles to find formulas, to work out the amounts in a reaction and to make solutions of a given strength. Python does the long arithmetic, so you can think about the chemistry.
4 courses
Chapter 3Contains Standard content
The Mole Concept, Molecules, Ions and Formulae, Laws of Chemical Combination
Burn a candle, and the wax seems to disappear. Does matter really vanish in a chemical change? In this chapter we meet the two laws that scientists found by weighing before and after a reaction. They lead us to the atom, the tiny particle that every element is made of. We learn how atoms join to form molecules and ions, how to write a chemical formula, and how chemists count atoms with a unit called the mole. Python helps us with the calculations.
4 courses