Which of the following always means a chemical reaction has occurred when you mix a powder into a liquid?(1 point) Responses You observe bubbles in the mixture. You observe bubbles in the mixture. The liquid or the powder breaks down. The liquid or the powder breaks down. The powder dissolves in the liquid. The powder dissolves in the liquid. The liquid is at its boiling point.
1 answer
The response that always means a chemical reaction has occurred when you mix a powder into a liquid is:
You observe bubbles in the mixture.
Bubbles can indicate the release of gas, which often occurs during a chemical reaction. The other options can occur for physical changes or other non-chemical reaction processes.
