The table below shows representations of the molecules of four different compounds: W, X, Y, and Z.
| Compound W | Compound X | Compound Y | Compound Z |
|---|---|---|---|
| H−Cl\text{H}-\text{Cl}H−Cl | Central N\text{N}N atom bonded to three separate H\text{H}H atoms | O=C=O\text{O}=\text{C}=\text{O}O=C=O | H−O−O−H\text{H}-\text{O}-\text{O}-\text{H}H−O−O−H |
The molecular formula of compound W is HCl\text{HCl}HCl.
Give the molecular formula of compound Z.