Identifying chemical reactions versus physical changes.
Сборник задач по химии. 8 класс - Аверсэв reshenie sbornika zadach po khimii 8 klass v.n.khvaliuk
Below is a typical and the key topics covered in the collection, based on the standard 8th-grade chemistry program and the structure of Khvalyuk's problem sets: Part 1: Initial Chemical Concepts Identifying chemical reactions versus physical changes