Write the molecular formula for a compound with the possibleelements C, H, N and O that exhibits a molecular ion atM+ =128.063.
Exact Masses of the Most Abundant Isotope of SelectedElements| Isotope | Natural abundance(%) | Exact mass |
|---|
| 1H | 99.985 | 1.008 |
| 12C | 98.90 | 12.000 |
| 14N | 99.63 | 14.003 |
| 16O | 99.76 | 15.995 |
Molecular formula  (In the order CHNO, with nosubscripts)
