Rate is in units of molarity per second, M/s or M s�?.  Since molarity is moles per liter, mol/L or mol L�?, the units of the rate are mol L�? s�?,
  
     mol   
    L s
  
 Just plug in your number of moles, volume (convert to liters), and seconds, and that will give you the rate in M/s.
 
Steve