Answer to Question #73135 in General Chemistry for rachel

Question

A certain brand of sunscreen contains 2.50% by mass benzl salicylate. if a tube contains 4.00 ounces of sunscreen, how many kilograms of benyzl salicylate are needed to manufacture 325 tubes of sunscreen?

Answer 1

The solution can be set up as a couple of conversions:
325 tubes of sunscreen (4.00 oz of sunscreen/1 tube of sunscreen) = 1300 oz of sunscreen,
1300 oz of sunscreen (1 kg / 35.274 oz) = 36.85 kg of sunscreen,
36.85 kg of sunscreen (0.025 kg of benzyl salicylate/1 kg of sunscreen ) = 0.921 kg of benzyl salicylate.
Answer: 0.921 kg of benzyl salicylate.