A commercially available product contains 18 g of ointment with a drug concentration of 5 % w/w. A prescription calls for fortification of the ointment to a 15 % w/w concentration. What mass of pure drug, in units of grams, should be added to the ointment to make an ointment of 15 % w/w concentration?
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A commercially available product contains 18 g of ointment with a drug concentration of 5 % w/w. A prescription calls for fortification of the ointment to a 15 % w/w concentration. What mass of pure drug, in units of grams, should be added to the ointment to make an ointment of 15 % w/w concentration?
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