Question

Which of the following changes demonstrates a chemical property? *

O A substance breaks in half
A substance combusts (burns)
O A hammer bounces off a substance
O A substance floats in water


Answer 1

The answer would be "A substance combusts (burns)".

Explanation

All of the other options are basic physical changes that don't alter the substance on a molecular level, whereas burning a substance permanently changes the molecular makeup.

Answer 2

The correct answer is B. Combustion is a chemical change. When a substance is burned, it forms new substances. Therefore, combustibility is a chemical property because it can only be observed when a substance undergoes a chemical change.

Step-by-step explanation:

Hope that helps!