3.9 g + 12.7 g = 16.6 g
The sum of the masses of potassium and iodine equals the mass of the product, potassium iodide. The results are consistent with he law of conservation of mass.
Hope this heeeelllllllpppppppp
        
             
        
        
        
Answer:
  A.    2Na       +    2H₂O   →    2NaOH   +  H₂   
Explanation:
When sodium is reacted with water, a single replacement reaction occurs. The product of the reaction is typically sodium hydroxide and hydrogen gas. 
 Reactants: 
         Sodium +  water
Product: 
         Sodium hydroxide + hydrogen gas
 So; 
           2Na       +    2H₂O   →    2NaOH   +  H₂   
 
        
             
        
        
        
Answer:
Neutral atoms can be turned into positively charged ions by removing one or more electrons.
Explanation:
If there is an atom that has 9 protons and 9 electrons, removing an electron from the atom will gain a postive charge.
 
        
                    
             
        
        
        
The iupac name of the compound will be hex-3-yne or 3-hexyne. By marking number of carbon in the given compound, it was found that triple bond comes at third position and there are total 6 carbon in the compound. So it will have Hex as a prefix and as it contains triple bond so it will have yne as a suffix and as the triple bond is at third position, so it will be hex-3-yne or 3-hexyne.
 
        
                    
             
        
        
        
Answer:
Mass is the amount of matter in an object and does not change with location.
Explanation: