if you add 18 g of benzoic acid to 103 g of an ointment base, what is the final concentration (w/w) of the product

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Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.