| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | na2s | Western culture | Sodium sulfide is commonly used in industrial and laboratory processes in Western culture. | 2 |
| 2 | na2s | African | Sodium sulfide (Na2S) is not commonly known or used in everyday African culture. | 1 |
| 3 | na2s | American | Sodium sulfide (Na2S) is used in American laboratories for chemical reactions. | 1 |