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How many grams of petrolatum should be added to 30g of a 20% oleaginous ointment to prepare 5% oleaginous ointment?

Posted: Mon May 09, 2022 5:04 pm
by answerhappygod
How many grams of petrolatum should be added to 30g of a 20%
oleaginous ointment to prepare 5% oleaginous ointment?