Physical Chemistry #2: Empirical/Molecular Formulas, Using Sig Figs (Slides & Student Led Tasks)

This lesson goes over the concepts of empirical and molecular formulas and how to correctly use significant figures. This is lesson two in our physical chemistry series from unit 1: Atoms, Molecules and Stoichiometry (from the Cambridge International AS Chemistry Curriculum).

LESSON OBJECTIVE: Understand and calculate empirical and molecular formulas. Understand how to report calculations to the correct amount of significant figures.

LEARNING OUTCOMES (taken from the Cambridge International AS and A Level Chemistry (9701) 2019-2021 curriculum):
1.4 The calculation of empirical and molecular formulae
a) define and use the terms empirical and molecular formula
b) calculate empirical and molecular formulae, using combustion data or composition by mass