If you are looking for an updated PDF or physical copy, these are the core areas usually included:

Calculating concentrations from experimental data. Energetics: Using Bond Enthalpies and Hess’s Law cycles.

Using balanced equations to predict yields. The Ideal Gas Equation: Mastering with correct SI units.

Here is a comprehensive guide to understanding these calculations and how to find the most "up-to-date" materials. Why Jim Clark’s Calculations are the Gold Standard