2.5 mL First lets get the units the same for the suspension (in mg) and the required amount of ampicillin (in g): 1 g = 1000 mg - 0.125 g = 125 mg For easy calculation and for better understanding of what you are doing, it is best to then calculate how many mg is in 1 mL: (250 mg) / ( 5.0 mL)= (50...