Identifying chemical reactions versus physical changes.

Сборник задач по химии. 8 класс - Аверсэв

Calculating the percentage of an element in a compound or a solute in a solution. Part 3: Major Classes of Inorganic Compounds

The problem book for by V.N. Khvalyuk (often co-authored with V.I. Rezyapkin) is a standard educational resource used to practice key chemical concepts and calculations. The book is designed to align with the theoretical material taught in the 8th-grade curriculum.

Problems involving mass balance in reactions.

Exercises on distinguishing homogeneous and heterogeneous mixtures and methods of separation.