| Hint | Answer | % Correct |
|---|---|---|
| Water | H2O | 100%
|
| Oxygen gas | O2 | 90%
|
| Table salt | NaCl | 88%
|
| Ozone | O3 | 67%
|
| Methane | CH4 | 62%
|
| Nitrous oxide | N2O | 52%
|
| Glucose | C6H12O6 | 48%
|
| Cyanide | CN | 33%
|
| Phenolphthalein | C20H14O4 | 0%
|
| Phosgene | COCl2 | 0%
|