When hydrogen gas burns in the presence of oxygen, atoms are rearranged and a new substance is formed. Because a new substance is formed, which of these statements must BEST describe what happens?(1 point)

Question

Responses

The properties of the new substance are different, so a physical change took place.
The properties of the new substance are different, so a physical change took place.

The properties of the new substance are the same, so a physical change took place.
The properties of the new substance are the same, so a physical change took place.

The properties of the new substance are different, so a chemical change took place.
The properties of the new substance are different, so a chemical change took place.

The properties of the new substance are the same, so a chemical change took place.

Answer 1

The best statement that describes what happens when hydrogen gas burns in the presence of oxygen is:

The properties of the new substance are different, so a chemical change took place.

This statement accurately reflects that during the burning process, a chemical reaction occurs, resulting in the formation of water (H2O), which has different properties from the original hydrogen and oxygen gases.