Answer:
A. The color change from blue to green happens in nature.
Explanation:
The color change is an indicator of a chemical reaction that has occurred. Although color changes are not necessarily good diagnostic tool to measure if a chemical reaction has occurred or not.
- In this reaction, color changes is quite an effective tool
- Chemical changes usually involves the formation of a new product from the chemical reaction.
- Also, the steps are not easily reversible.
- For this reaction, color change is the most appropriate signal for a chemical change.
Answer:
11
Explanation:
The atomic number for Na will always be the same regardless of the number of neutrons.
did u ever get the answer ? I’m also on k12 stuck on this lol
For combustion reaction we need oxygen and the results most of the time produce heat which mean first one is correct.
