Answer: True the dilution formula is a balanced of mole of the solute..
Explanation:
M1V1 = M2V2
When M1= 1.2M, M2= 0.25M V2= 1.4L and V1= ?
Then V1= 0.25*1.4/1.2
 = 0.29
This indicate that 0.29L of the 1.2M NH4Cl will be dilluted to 0.25M in 1.4L of the solution....
The mole number of the solute remain constant
 
        
             
        
        
        
The building block that makes up all matter in the universe is atoms.
Hope that helps you:)
        
             
        
        
        
Answer is (3) protons and neutrons.
(P.S. The outer part contains the electrons)