A patient has an order for ampicillin 0.5 g IM every 6 hours…

A patient has an order for ampicillin 0.5 g IM every 6 hours.  The vial reads ampicillin 1000mg which, when mixed with 2.2 mL of sterile water, will yield 2.8 ml of drug solution.  How many mL of the drug will you administer (round to the nearest tenth if necessary)?