My Apoligies for not being sooner.
Answer: The closer the particles get or the further apart they get, the greater the sound's amplitude. Sound amplitude causes a sound's loudness and intensity. The bigger the amplitude is, the louder and more intense the sound. - (This is copied)
General Answer : Its a change in sound, bassically the bigger the waves are, the louder the sound is.
 
        
             
        
        
        
The types of intermolecular forces that occur in a substance will affect its physical properties, such as its phase, melting point and boiling point.
        
             
        
        
        
Answer: The molar mass of the given compound is 
Explanation:
In molecular formula of  there are two chlorine atoms and one calcium atom.
 there are two chlorine atoms and one calcium atom.
The atomic mass of the calcium = 40.07 g/mol
The atomic mass of chlorine = 35.5 g/mol
Molar mass of the guven compound is :

The molar mass of the given compound is 