Question

an air mattress is filled with 0.55 moles of air. the air inside the mattress has a temperature of 295 K and an absolute pressure of 3.5 kilopascals , what is the volume of the air mattress

Answer 1

Explanation:Using the equation, PV=nRT, you can solve this problem.

P= 3.5 kPa V=? n= 0.55 moles of air T= 295K R= 8.314 (L kPa/mol K)

We use the constant rate of 8.314 because we are using kilopascals in this problem.

Using simple algebra we get-

V = (0.55 moles)(8.314 L kPa/mol k)(295 K) / 3.5 kPa

Using the calculator, we would get the answer of 385.4132857 L.

And whatever the significant figure is asked for, for example, 3 significant figures: the answer would be 385 liters.