Answer:
Stone does not have organic matter in it to burn in presence of air. Hence, it is a non combustible.
Rocks are quite bundled up together. Hence, they are very difficult to get mixed together.
 
        
                    
             
        
        
        
Answer:
6
Explanation:
Any atom with the atomic number 6 is carbon and has 6 protons
 
        
                    
             
        
        
        
Answer:
0.15 l of 4.0 m stock KCl solution should betaken
Explanation:
N1V1=N2V2
6*0.1=V2*4
V2=0.15L
 
        
             
        
        
        
Answer:
a.the smallest building blocks of matter
Explanation:
because atoms are the smallest building blocks of matter.