Answer: The reactants are baking soda and vinegar. Baking soda is a white powder, and vinegar is a clear liquid. The products of this reaction are carbon dioxide, water, and sodium acetate. Carbon dioxide is a colorless gas, water is a colorless liquid, and sodium acetate is a white crystalline powder. 
A chemical change can be seen in how the molecular formulas of the products are different from the reactants, since the reactants have chemically changed into completely different molecules.
Hope this helps
 
        
             
        
        
        
I believe it is C but if not that A
        
             
        
        
        
Tentacles with stinging cells, 2 body layers (ectoderm & endoderm), radially symmetric
        
             
        
        
        
Answer:
Hi, There!
Based on your understanding, what is Big bang Theory?
- <em>The Big Bang is an idea about the history of the Universe, the history of space and time and matter and Energy.</em>
Therefore, I Hope this helps!