which observation was a sign that a chemical reaction was occurring in this experiment?\nformation of a…
which observation was a sign that a chemical reaction was occurring in this experiment?\nformation of a solid\nchange in color\nformation of gas bubbles\nproduction of light
Answer
Brief Explanations:
In a chemical reaction, the formation of a solid (precipitation), change in color, formation of gas bubbles (effervescence), and production of light are all common indicators. These are signs that new substances with different properties are being formed.
Answer:
All of the above options (formation of a solid, change in color, formation of gas bubbles, production of light) can be signs that a chemical reaction is occurring.