Question

Which of the following compounds contains a coordinate (dative) covalent bond?

• A. HCl
• B. NH\textsubscript{3}
• C. H\textsubscript{2}O
• D. NH\textsubscript{4}\textsuperscript{+}

Hint:

Coordinate bonds occur when one atom donates both electrons for bonding. Watch for ions like NH\textsubscript{4}\textsuperscript{+} or H\textsubscript{3}O\textsuperscript{+}.