Question

which substance is a mixture?
table salt
gasoline
aluminum
carbon dioxide

Explanation:

To determine which substance is a mixture, we analyze each option:

• Table salt (sodium chloride, \( \text{NaCl} \)) is a compound (pure substance).
• Gasoline is a mixture of various hydrocarbons (different molecules combined physically, not chemically bonded in a fixed ratio).
• Aluminum (\( \text{Al} \)) is an element (pure substance).
• Carbon dioxide (\( \text{CO}_2 \)) is a compound (pure substance).

So gasoline is the mixture.

Answer:

B. gasoline