| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | chemical reactions | Chemistry classes in educational institutions | Studied and observed to understand the behavior of substances | 1 |
| 2 | chemical reactions | Chemistry education in the West | Chemical reactions involve the rearrangement of atoms to form new substances, following principles like conservation of mass and energy. | 1 |
| 3 | chemical reactions | chemistry education in western countries | Extensive study of different types of chemical reactions and their mechanisms | 1 |