The healthcare provider prescribes magnesium sulfate 300 mg/hour IV. The IV bag contains magnesium sulfate 4 grams in dextrose 5% in water (D:W) 500 mL. How many mL/hour should the nurse set the infusion pump? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

First, convert the grams to milligrams: 1 gram = 1000 milligrams So, 4 grams = 4 x 1000 = 4000 milligrams Now, calculate the infusion rate: Infusion rate = Desired dose / Concentration Infusion rate = 300 mg/hour / (4000 mg / 500 mL) Infusion rate = 300 mg/hour x (500 mL / 4000 mg) Infusion rate = 37.5 mL/hour