Question

which example shows a chemical change?
vinegar reacting with baking soda
a cars new paint job
folding a paper airplane
mixing sand and pebbles

Explanation:

Step1: Understand chemical change

A chemical change produces new substances.

Step2: Analyze each option

• Mixing sand and pebbles: No new substance, physical change.
• Folding a paper airplane: No new substance, physical change.
• A car's new paint job: No new substance, physical change.
• Vinegar (acetic acid) + baking soda (sodium bicarbonate): Produces carbon dioxide, water, and sodium acetate (new substances), chemical change.

Answer:

Vinegar reacting with baking soda