Question

Which observation most likely indicates that only a chemical change has taken place?(1 point)%0D%0AResponses%0D%0A%0D%0AA reaction occurs.%0D%0AA reaction occurs.%0D%0A%0D%0AThe change cannot be reversed.%0D%0AThe change cannot be reversed.%0D%0A%0D%0AThe shape changes.%0D%0AThe shape changes.%0D%0A%0D%0AStates of matter changes.

Answer 1

The observation that most likely indicates that only a chemical change has taken place is: **The change cannot be reversed.**

While some physical changes can be reversed (such as changing the shape or states of matter), a chemical change typically results in the formation of new substances that cannot be easily reverted to their original forms.