Multiple choice Order: heparin 2500 units. Have: heparin 10,000 units/ml. Give? 0.025 ml 2.5 ml 25 ml 0.25 ml Reveal answer Fill a bubble to check yourself D Correct answer Explanation Using the formula (Desired / Have) * Quantity: (2500 units / 10000 units) * 1 ml = 0.25 ml.