A sunscreen preparation contains 2.50% by mass benzyl salicylate. If a tube contains 4.0 ounces of sunscreen, how many kilograms of benzyl salicylate are needed to manufacture 325 tubes of sunscreen?
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Ok. If you have 325 tubes of sunscreen then you have 325*4oz= 1300 oz of sunscreen and that must contain 0.025*1300 = 32.5 oz of BS. Now you wanted the answer in kg so...there are 28.375 g/oz and multiplying by 32.5 I get 922.188 g of BS...or 0.922188 kg of BS. But you'd probably be safe in saying 0.92 kg.
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each tube has 0/1 oz (2.5% of 4)
325 tubes have 32.5 oz
32.5 oz is 0.921359502 kilograms
0.921359502 kilograms :)
325 tubes have 32.5 oz
32.5 oz is 0.921359502 kilograms
0.921359502 kilograms :)
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benzyl salicylate is a carcinogen( cancer causing) great for putting on the skin out in the sun -eh? so is para amino benzoic acid(PABA) the other main constituent of most sunscreens