Final answer:
To calculate the number of milliliters of Compazine to give, divide the ordered dose by the concentration of the medication on hand. In this case, the volume would be 2ml.
Step-by-step explanation:
To calculate the number of milliliters of Compazine to give, divide the ordered dose (10mg) by the concentration of the medication on hand (5mg/ml). This will give you the volume in milliliters.
Formula: Volume (ml) = Ordered Dose (mg) / Concentration (mg/ml)
In this case, Volume (ml) = 10mg / 5mg/ml = 2ml