The table shows the molecular formulae of three compounds.
| Compound | Molecular formula |
|---|---|
| J | C7H16\text{C}_7\text{H}_{16}C7H16 |
| K | C7H14\text{C}_7\text{H}_{14}C7H14 |
| L | C2H5Cl\text{C}_2\text{H}_5\text{Cl}C2H5Cl |
Use the definition of a hydrocarbon to classify each compound as a hydrocarbon or not a hydrocarbon. Support each classification with evidence from its formula.
Explain whether each hydrocarbon identified in part (a) is an alkane.