Question

which of these is a base?
hno3
vinegar
ammonia
hci

Explanation:

• \(HNO_3\) (nitric acid) is an acid as it donates \(H^+\) ions.
• Vinegar contains acetic acid (\(CH_3COOH\)), which is an acid.
• \(HCl\) (hydrochloric acid) is an acid as it donates \(H^+\) ions.
• Ammonia (\(NH_3\)) can accept \(H^+\) ions (e.g., \(NH_3 + H^+ = NH_4^+\)) and is a base.

Answer:

ammonia