Asunscreen preparation contains 2.40 %% by mass benzyl salicylate. if a tube contains 6.0 ozoz of sunscreen, how many kilograms of benzyl salicylate are needed to manufacture 290 tubes of sunscreen?

Answer : The mass of benzyl salicylate needed to manufacture 290 tubes of sunscreen are, 1.18 kg

Explanation :

As we are given that a sunscreen preparation contains 2.40 % by mass benzyl salicylate. That means, 2.40 grams of benzyl salicylate present in 100 g of solution.

First we have to convert the given mass from oz into kg.

Conversion used:

1 kg = 35.274 oz

or,

So,

Now we have to determine the mass of benzyl salicylate.

As, 100 g of solution contains mass of benzyl salicylate = 2.40 g

So, 0.1701 kg of solution contains mass of benzyl salicylate =

Now we have to determine the mass of benzyl salicylate are needed to manufacture 290 tubes of sunscreen.

Mass of benzyl salicylate in 290 tubes of sunscreen = 0.00408 kg × 290

Mass of benzyl salicylate in 290 tubes of sunscreen = 1.18 kg

Thus, the mass of benzyl salicylate needed to manufacture 290 tubes of sunscreen are, 1.18 kg

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