Most GDZ sites are organized by the specific textbook used in your classroom. The most common ones are:

Химия, 9 класс: уроки, тесты, задания - ЯКласс

: The standard for many schools, known for a broad but sometimes complex approach.

If you are looking for solutions, they will likely fall under these major curriculum blocks:

: Mastering the electronic balance method to solve complex equations.