Question

which of the following is an example of a compound? *
hydrogen
ocean water
sodium chloride
a cup of mixed fruit

Explanation:

To determine a compound, recall: A compound is a substance made of two or more different elements chemically bonded.

• Hydrogen: Element (single type atom), not compound.
• Ocean water: Mixture (water + salts, etc., not bonded).
• Sodium chloride ($\text{NaCl}$): Made of $\text{Na}$ and $\text{Cl}$ atoms bonded, so compound.
• Mixed fruit: Mixture (different fruits, no bonding).

Answer:

C. sodium chloride