A few days ago
Anonymous

Can anyone please help me solve this short chemistry calculation?

There is a horrible smell in the classroom. The teacher goes out and gets some air freshener to cover up the smell so that we can have class. With budgets how they are, we need to buy the minimum amount. So, we have to calculate.

It takes 2.4×10^-9 gram per liter of the air freshener to cover up the smell — the sensitivity of the nose to the air freshener product, which costs $127 per 5 g. The teacher measures the size of classroom and finds it to be 6.50×104 ft^3.

What is the minimum cost in cents of the air freshener that the teacher must buy so that we can have class?

Express your answer to the actual whole number of cents that the teacher would have to spend.

I’ll appreciate any help. Please answer anytime you feel like it.

Top 1 Answers
A few days ago
lemons

Favorite Answer

first, you convert ft^3 into liter. since the price of the air freshener depends on the volume of the room, you have to express the volume in liters.

one cubic foot is equal to 28.32 liters, so, converting that:

6.50 x 10^4 ft^3 x (28.32 liters / 1 ft^3) = 1.84 x 10^6 liters

now, all you have to do is multiply the mass per liter to the volume, and multiply the product to the price per gram.

it looks like this:

1.84 x 10^6 liters x 2.4 x 10^-9 grams/liter = 4.41 x 10^-3 grams

since the price is $127 per 5 g, we can write that as ($127/5 g).

4.41 x 10^-3 grams x ($127/5 g) = $ 0.11

the teacher has to spend 11 cents.

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