1. The problem involves naming chemical compounds based on their given formulas or names. 2. Sodium dioxonitrate corresponds to the nitrate ion, which is NO3 with a charge of -1. Sodium nitrate is NaNO3. 3. Potassium trioxochloro corresponds to potassium chlorate, which is KClO3. 4. Calcium trioxosulphate corresponds to calcium sulfate, which is CaSO4. 5. For part a) "Nfty 804" is unclear as a chemical name or formula; please provide more context or correct the formula for accurate assistance. Final answers: - Sodium dioxonitrate: NaNO3 - Potassium trioxochloro: KClO3 - Calcium trioxosulphate: CaSO4