Answer:
(3) NaNO₃
Step-by-step explanation:
Sodium nitrate has ionic bonds, because it consists of Na⁺ and NO₃⁻ ions.
However, the nitrate ions have covalent bonds between the O atoms and the central N atoms.
(1) and (2) are wrong. Both N₂O₅ and HCl consist of nonmetals, so they are covalent compounds.
(4) is wrong. NaCl has only ionic bonds between the Na⁺ and Cl⁻ ions
