| consist of hydrogen | 0.82 |
| occur in earth | 0.57 |
| exist in liquid phase | 0.56 |
| exist as gas | 0.51 |
| contaminate soil | 0.48 |
| form in reaction | 0.40 |
| exist below the surface… | 0.38 |
| produce compound | 0.36 |
| react with oxygen | 0.36 |
| react with nitrogen oxi… | 0.34 |
| More » |
| eye irritation | 0.16 |
| carbon | 0.82 |
| fluorine | 0.29 |
| only single bonds | 0.29 |
| carbon numbers | 0.29 |
| carbon-13 isotopes | 0.25 |
| double bonds | 0.25 |
| terminal carbon | 0.25 |
| ether bond | 0.25 |
| steam | 0.25 |
| organic compound | 0.75 |
| compound | 0.60 |