Its total mechanical energy is <em>2,000 J</em>.
We don't have enough information to say anything about its heat energy, its chemical energy, or the energy due to any electrical charge it may be carrying or any magnetic field it may have.
 
        
             
        
        
        
Jnejanajajaowowksjajsmamsmnsnsnejeeiei
        
             
        
        
        
315g/95gmol-1 
3.315 moles of MgCl2